{"id":73217,"date":"2023-08-02T11:06:09","date_gmt":"2023-08-02T04:06:09","guid":{"rendered":"https:\/\/wiki.tino.org\/staging\/?p=73217"},"modified":"2026-10-28T11:40:17","modified_gmt":"2026-10-28T04:40:17","slug":"muc-dich-chinh-cua-viec-dua-ra-ten-mien","status":"publish","type":"post","link":"https:\/\/tino.vn\/blog\/muc-dich-chinh-cua-viec-dua-ra-ten-mien\/","title":{"rendered":"M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a vi\u1ec7c \u0111\u01b0a ra t\u00ean mi\u1ec1n l\u00e0 g\u00ec?"},"content":{"rendered":"\n

M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a vi\u1ec7c \u0111\u01b0a ra t\u00ean mi\u1ec1n l\u00e0 gi\u00fap con ng\u01b0\u1eddi truy c\u1eadp website, m\u00e1y ch\u1ee7 v\u00e0 email b\u1eb1ng m\u1ed9t c\u00e1i t\u00ean d\u1ec5 nh\u1edb (nh\u01b0 tino.vn) thay cho \u0111\u1ecba ch\u1ec9 IP d\u1ea1ng s\u1ed1.<\/strong> H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (DNS) t\u1ef1 d\u1ecbch t\u00ean \u0111\u00f3 th\u00e0nh \u0111\u1ecba ch\u1ec9 IP, n\u00ean ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng c\u1ea7n bi\u1ebft website \u0111\u1eb7t \u1edf m\u00e1y ch\u1ee7 n\u00e0o.<\/p>\n\n\n\n

\u0110\u1ecbnh ngh\u0129a \u0111\u1ea7y \u0111\u1ee7, c\u1ea5u t\u1ea1o v\u00e0 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u00ean mi\u1ec1n c\u00f3 \u1edf b\u00e0i t\u00ean mi\u1ec1n l\u00e0 g\u00ec<\/a>; khi \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c t\u00ean, b\u1ea1n xem quy tr\u00ecnh \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n t\u1ea1i Vi\u1ec7t Nam<\/a>. B\u00e0i n\u00e0y tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi “v\u00ec sao c\u1ea7n t\u00ean mi\u1ec1n”: t\u00ean mi\u1ec1n ra \u0111\u1eddi \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 g\u00ec, h\u1ec7 th\u1ed1ng DNS h\u00ecnh th\u00e0nh ra sao v\u00e0 Internet s\u1ebd th\u1ebf n\u00e0o n\u1ebfu kh\u00f4ng c\u00f3 n\u00f3.<\/p>\n\n\n\n

M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a vi\u1ec7c \u0111\u01b0a ra t\u00ean mi\u1ec1n l\u00e0 g\u00ec?<\/h2>\n\n\n\n

T\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c \u0111\u01b0a ra tr\u01b0\u1edbc h\u1ebft \u0111\u1ec3 thay \u0111\u1ecba ch\u1ec9 IP b\u1eb1ng t\u00ean d\u1ec5 nh\u1edb, sau \u0111\u00f3 \u0111\u1ec3 t\u00ean c\u1ee7a d\u1ecbch v\u1ee5 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o m\u00e1y ch\u1ee7 \u0111ang ch\u1ea1y n\u00f3. T\u1eeb hai m\u1ee5c \u0111\u00edch k\u1ef9 thu\u1eadt n\u00e0y m\u1edbi c\u00f3 c\u00e1c l\u1ee3i \u00edch nh\u01b0 nh\u1eadn di\u1ec7n th\u01b0\u01a1ng hi\u1ec7u, email ri\u00eang v\u00e0 s\u1ef1 tin c\u1eady.<\/p>\n\n\n\n

Thay \u0111\u1ecba ch\u1ec9 IP kh\u00f3 nh\u1edb b\u1eb1ng t\u00ean d\u1ec5 nh\u1edb<\/h3>\n\n\n\n

M\u1ed7i m\u00e1y ch\u1ee7 tr\u00ean Internet c\u00f3 m\u1ed9t \u0111\u1ecba ch\u1ec9 IP, v\u00ed d\u1ee5 203.0.113.10 v\u1edbi IPv4 ho\u1eb7c m\u1ed9t chu\u1ed7i d\u00e0i h\u01a1n nhi\u1ec1u v\u1edbi IPv6. Nh\u1edd t\u00ean mi\u1ec1n, ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng c\u1ea7n nh\u1edb c\u00e1c con s\u1ed1 n\u00e0y m\u00e0 ch\u1ec9 c\u1ea7n g\u00f5 t\u00ean v\u00e0o thanh \u0111\u1ecba ch\u1ec9 tr\u00ecnh duy\u1ec7t \u0111\u1ec3 k\u1ebft n\u1ed1i t\u1edbi website mong mu\u1ed1n.<\/p>\n\n\n\n

Vi\u1ec7c chuy\u1ec3n t\u00ean th\u00e0nh \u0111\u1ecba ch\u1ec9 do h\u1ec7 th\u1ed1ng DNS<\/a> l\u00e0m t\u1ef1 \u0111\u1ed9ng m\u1ed7i khi b\u1ea1n m\u1edf trang; k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c l\u01b0u \u0111\u1ec7m m\u1ed9t th\u1eddi gian n\u00ean c\u00e1c l\u1ea7n sau nhanh h\u01a1n.<\/p>\n\n\n\n

Gi\u1eef nguy\u00ean t\u00ean khi \u0111\u1ed5i m\u00e1y ch\u1ee7<\/h3>\n\n\n\n

T\u00ean mi\u1ec1n t\u00e1ch “t\u00ean” kh\u1ecfi “\u0111\u1ecba ch\u1ec9”. Khi b\u1ea1n chuy\u1ec3n website sang hosting ho\u1eb7c VPS kh\u00e1c, \u0111\u1ecba ch\u1ec9 IP thay \u0111\u1ed5i nh\u01b0ng ch\u1ec9 c\u1ea7n s\u1eeda b\u1ea3n ghi DNS, t\u00ean mi\u1ec1n, \u0111\u01b0\u1eddng d\u1eabn \u0111\u00e3 chia s\u1ebb v\u00e0 \u0111\u1ecba ch\u1ec9 email v\u1eabn gi\u1eef nguy\u00ean. N\u1ebfu m\u1ecdi ng\u01b0\u1eddi truy c\u1eadp b\u1eb1ng IP, m\u1ed7i l\u1ea7n \u0111\u1ed5i m\u00e1y ch\u1ee7 l\u00e0 m\u1ed9t l\u1ea7n ph\u1ea3i b\u00e1o \u0111\u1ecba ch\u1ec9 m\u1edbi.<\/p>\n\n\n\n

Chia vi\u1ec7c qu\u1ea3n l\u00fd t\u00ean cho nhi\u1ec1u \u0111\u01a1n v\u1ecb<\/h3>\n\n\n\n

T\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c theo c\u1ea5p, n\u00ean kh\u00f4ng c\u1ea7n m\u1ed9t n\u01a1i duy nh\u1ea5t n\u1eafm to\u00e0n b\u1ed9 danh s\u00e1ch t\u00ean. V\u00f9ng g\u1ed1c ch\u1ec9 bi\u1ebft c\u00e1c \u0111u\u00f4i nh\u01b0 .com, .vn; m\u1ed7i \u0111u\u00f4i do m\u1ed9t \u0111\u01a1n v\u1ecb qu\u1ea3n l\u00fd, v\u00e0 ch\u1ee7 t\u00ean mi\u1ec1n t\u1ef1 qu\u1ea3n l\u00fd c\u00e1c t\u00ean con nh\u01b0 blog.tino.vn. C\u00e1ch chia n\u00e0y gi\u00fap h\u1ec7 th\u1ed1ng m\u1edf r\u1ed9ng khi s\u1ed1 t\u00ean mi\u1ec1n t\u0103ng m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t m\u00e1y ch\u1ee7 trung t\u00e2m.<\/p>\n\n\n\n

X\u00e2y d\u1ef1ng th\u01b0\u01a1ng hi\u1ec7u v\u00e0 x\u00e1c \u0111\u1ecbnh l\u0129nh v\u1ef1c ho\u1ea1t \u0111\u1ed9ng<\/h3>\n\n\n\n

T\u00ean mi\u1ec1n ph\u00f9 h\u1ee3p gi\u00fap x\u00e2y d\u1ef1ng v\u00e0 \u0111\u1ecbnh h\u00ecnh th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a doanh nghi\u1ec7p hay t\u1ed5 ch\u1ee9c tr\u00ean m\u00f4i tr\u01b0\u1eddng tr\u1ef1c tuy\u1ebfn. M\u1ed9t t\u00ean mi\u1ec1n ng\u1eafn, d\u1ec5 \u0111\u1ecdc t\u1ea1o \u1ea5n t\u01b0\u1ee3ng ban \u0111\u1ea7u t\u00edch c\u1ef1c v\u00e0 gi\u00fap kh\u00e1ch h\u00e0ng nh\u1edb l\u1ea1i khi c\u1ea7n.<\/p>\n\n\n\n

T\u00ean mi\u1ec1n v\u00e0 \u0111u\u00f4i t\u00ean mi\u1ec1n c\u0169ng g\u1ee3i \u00fd l\u0129nh v\u1ef1c ho\u1ea1t \u0111\u1ed9ng: ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 \u0111o\u00e1n n\u1ed9i dung c\u1ee7a trang tr\u01b0\u1edbc khi truy c\u1eadp, v\u00ed d\u1ee5 \u0111u\u00f4i .edu.vn th\u01b0\u1eddng thu\u1ed9c c\u01a1 s\u1edf gi\u00e1o d\u1ee5c, .gov.vn thu\u1ed9c c\u01a1 quan nh\u00e0 n\u01b0\u1edbc.<\/p>\n\n\n\n

T\u1ea1o s\u1ef1 chuy\u00ean nghi\u1ec7p, tin c\u1eady v\u00e0 b\u1ea3o v\u1ec7 th\u01b0\u01a1ng hi\u1ec7u<\/h3>\n\n\n\n

T\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m, m\u1ed7i t\u00ean mi\u1ec1n ch\u1ec9 thu\u1ed9c v\u1ec1 m\u1ed9t ch\u1ee7 th\u1ec3, n\u00ean t\u00ean mi\u1ec1n ri\u00eang gi\u00fap ph\u00e2n bi\u1ec7t b\u1ea1n v\u1edbi t\u1ed5 ch\u1ee9c kh\u00e1c. \u0110\u1ecba ch\u1ec9 email theo t\u00ean mi\u1ec1n (v\u00ed d\u1ee5 lienhe@tencongty.vn) tr\u00f4ng \u0111\u00e1ng tin h\u01a1n h\u1ed9p th\u01b0 mi\u1ec5n ph\u00ed; xem th\u00eam email doanh nghi\u1ec7p<\/a>.<\/p>\n\n\n\n

\u0110\u0103ng k\u00fd s\u1edbm t\u00ean mi\u1ec1n tr\u00f9ng t\u00ean th\u01b0\u01a1ng hi\u1ec7u c\u0169ng gi\u00fap h\u1ea1n ch\u1ebf ng\u01b0\u1eddi kh\u00e1c d\u00f9ng t\u00ean \u0111\u00f3 \u0111\u1ec3 g\u00e2y nh\u1ea7m l\u1eabn ho\u1eb7c m\u1ea1o danh. T\u00ean mi\u1ec1n kh\u00f4ng thay cho vi\u1ec7c \u0111\u0103ng k\u00fd nh\u00e3n hi\u1ec7u; khi c\u00f3 tranh ch\u1ea5p, xem c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 v\u00e0 gi\u1ea3i quy\u1ebft tranh ch\u1ea5p t\u00ean mi\u1ec1n .vn \u1edf b\u00e0i VNNIC l\u00e0 g\u00ec<\/a>.<\/p>\n\n\n\n

D\u1ec5 m\u1edf r\u1ed9ng ho\u1ea1t \u0111\u1ed9ng<\/h3>\n\n\n\n

Khi doanh nghi\u1ec7p m\u1edf th\u00eam s\u1ea3n ph\u1ea9m hay th\u1ecb tr\u01b0\u1eddng m\u1edbi, c\u00f3 th\u1ec3 d\u00f9ng l\u1ea1i t\u00ean mi\u1ec1n ch\u00ednh b\u1eb1ng th\u01b0 m\u1ee5c ho\u1eb7c subdomain (shop.tencongty.vn, en.tencongty.vn) thay v\u00ec x\u00e2y l\u1ea1i nh\u1eadn di\u1ec7n t\u1eeb \u0111\u1ea7u. C\u00e1ch t\u1ea1o t\u00ean mi\u1ec1n con c\u00f3 \u1edf b\u00e0i subdomain l\u00e0 g\u00ec<\/a>.<\/p>\n\n\n\n

T\u00ean mi\u1ec1n ra \u0111\u1eddi nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n\n\n\n

T\u00ean mi\u1ec1n ra \u0111\u1eddi v\u00ec c\u00e1ch tra t\u00ean b\u1eb1ng m\u1ed9t t\u1ec7p danh s\u00e1ch chung kh\u00f4ng c\u00f2n theo k\u1ecbp t\u1ed1c \u0111\u1ed9 t\u0103ng c\u1ee7a m\u1ea1ng. N\u0103m 1983, h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n DNS \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t \u0111\u1ec3 thay t\u1ec7p \u0111\u00f3 b\u1eb1ng m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u00e2n c\u1ea5p, do nhi\u1ec1u m\u00e1y ch\u1ee7 c\u00f9ng tr\u1ea3 l\u1eddi.<\/p>\n\n\n\n

Tr\u01b0\u1edbc khi c\u00f3 DNS, c\u00e1c m\u00e1y tr\u00ean m\u1ea1ng ARPANET tra t\u00ean b\u1eb1ng t\u1ec7p HOSTS.TXT do trung t\u00e2m SRI-NIC (Vi\u1ec7n Nghi\u00ean c\u1ee9u Stanford) duy tr\u00ec. M\u1ed7i m\u00e1y \u0111\u1ecbnh k\u1ef3 t\u1ea3i b\u1ea3n m\u1edbi c\u1ee7a t\u1ec7p n\u00e0y; khi s\u1ed1 m\u00e1y t\u0103ng nhanh, t\u1ec7p ng\u00e0y c\u00e0ng l\u1edbn, c\u1eadp nh\u1eadt ch\u1eadm v\u00e0 d\u1ec5 tr\u00f9ng t\u00ean.<\/p>\n\n\n\n

Th\u00e1ng 11\/1983, Paul Mockapetris c\u00f4ng b\u1ed1 thi\u1ebft k\u1ebf DNS trong RFC 882<\/a> v\u00e0 RFC 883, v\u1edbi s\u1ef1 tham gia c\u1ee7a Jon Postel. N\u0103m 1984, RFC 920 x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111u\u00f4i \u0111\u1ea7u ti\u00ean; ng\u00e0y 15\/3\/1985, symbolics.com tr\u1edf th\u00e0nh t\u00ean mi\u1ec1n .com \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd (ng\u00e0y t\u1ea1o n\u00e0y v\u1eabn hi\u1ec7n trong d\u1eef li\u1ec7u RDAP c\u1ee7a Verisign khi tra ng\u00e0y 27\/10\/2026). N\u0103m 1987, RFC 1034<\/a> v\u00e0 RFC 1035 chu\u1ea9n ho\u00e1 DNS v\u00e0 v\u1eabn l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a h\u1ec7 th\u1ed1ng hi\u1ec7n nay.<\/p>\n\n\n\n

\"\u1ea2nh<\/figure>\n\n\n\n

\u1ea2nh ch\u1ee5p trang RFC 882 tr\u00ean rfc-editor.org ng\u00e0y 27\/10\/2026: t\u00e0i li\u1ec7u \u0111\u1ea7u ti\u00ean m\u00f4 t\u1ea3 h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n, nay \u0111\u00e3 \u0111\u01b0\u1ee3c thay b\u1eb1ng RFC 1034 v\u00e0 1035.<\/em><\/p>\n\n\n\n

\"So<\/figure>\n\n\n\n

N\u0103m 1998, ICANN<\/a> \u0111\u01b0\u1ee3c th\u00e0nh l\u1eadp \u0111\u1ec3 \u0111i\u1ec1u ph\u1ed1i t\u00ean mi\u1ec1n v\u00e0 \u0111\u1ecba ch\u1ec9 IP to\u00e0n c\u1ea7u. T\u1eeb n\u0103m 2012, ch\u01b0\u01a1ng tr\u00ecnh new gTLD c\u1ee7a ICANN m\u1edf th\u00eam h\u00e0ng tr\u0103m \u0111u\u00f4i m\u1edbi nh\u01b0 .shop, .online; chi ti\u1ebft c\u00f3 \u1edf b\u00e0i gTLD l\u00e0 g\u00ec<\/a>. T\u1ea1i Vi\u1ec7t Nam, t\u00ean mi\u1ec1n .vn do VNNIC<\/a> qu\u1ea3n l\u00fd.<\/p>\n\n\n\n

N\u1ebfu kh\u00f4ng c\u00f3 t\u00ean mi\u1ec1n, Internet s\u1ebd ra sao?<\/h2>\n\n\n\n

Kh\u00f4ng c\u00f3 t\u00ean mi\u1ec1n, Internet v\u1eabn ch\u1ea1y b\u1eb1ng \u0111\u1ecba ch\u1ec9 IP nh\u01b0ng kh\u00f3 d\u00f9ng h\u01a1n nhi\u1ec1u: ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i nh\u1edb d\u00e3y s\u1ed1, website \u0111\u1ed5i m\u00e1y ch\u1ee7 l\u00e0 \u0111\u1ed5i \u0111\u1ecba ch\u1ec9, v\u00e0 r\u1ea5t kh\u00f3 nh\u1eadn ra m\u1ed9t trang thu\u1ed9c v\u1ec1 ai. Ba h\u1ec7 qu\u1ea3 ch\u00ednh nh\u01b0 sau.<\/p>\n\n\n\n

Truy c\u1eadp trang web kh\u00f3 kh\u0103n<\/h3>\n\n\n\n

Thay v\u00ec d\u00f9ng t\u00ean mi\u1ec1n, ng\u01b0\u1eddi d\u00f9ng s\u1ebd ph\u1ea3i nh\u1eadp \u0111\u1ecba ch\u1ec9 IP, m\u1ed9t chu\u1ed7i s\u1ed1 kh\u00f3 nh\u1edb v\u00e0 d\u1ec5 g\u00f5 sai. Vi\u1ec7c ghi nh\u1edb v\u00e0 nh\u1eadp \u0111\u00fang \u0111\u1ecba ch\u1ec9 tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p, nh\u1ea5t l\u00e0 v\u1edbi IPv6. M\u1ed9t m\u00e1y ch\u1ee7 c\u0169ng th\u01b0\u1eddng ch\u1ea1y nhi\u1ec1u website tr\u00ean c\u00f9ng m\u1ed9t IP, n\u00ean ch\u1ec9 c\u00f3 IP th\u00ec m\u00e1y ch\u1ee7 kh\u00f4ng bi\u1ebft b\u1ea1n mu\u1ed1n m\u1edf website n\u00e0o.<\/p>\n\n\n\n

Kh\u00f3 ph\u00e2n lo\u1ea1i v\u00e0 qu\u1ea3n l\u00fd c\u00e1c trang web<\/h3>\n\n\n\n

N\u1ebfu ch\u1ec9 \u0111\u1ecbnh danh b\u1eb1ng \u0111\u1ecba ch\u1ec9 IP, vi\u1ec7c ph\u00e2n lo\u1ea1i, qu\u1ea3n l\u00fd v\u00e0 t\u00ecm ki\u1ebfm c\u00e1c trang web s\u1ebd r\u1ea5t kh\u00f3, v\u00ec d\u00e3y s\u1ed1 kh\u00f4ng cho bi\u1ebft trang thu\u1ed9c t\u1ed5 ch\u1ee9c, l\u0129nh v\u1ef1c hay qu\u1ed1c gia n\u00e0o.<\/p>\n\n\n\n

Kh\u00f3 nh\u1eadn ra trang th\u1eadt, trang gi\u1ea3<\/h3>\n\n\n\n

T\u00ean mi\u1ec1n g\u1eafn v\u1edbi m\u1ed9t ch\u1ee7 th\u1ec3 \u0111\u0103ng k\u00fd, n\u00ean ng\u01b0\u1eddi d\u00f9ng c\u00f3 c\u0103n c\u1ee9 \u0111\u1ec3 ph\u00e2n bi\u1ec7t trang ch\u00ednh th\u1ed1ng v\u1edbi trang gi\u1ea3 m\u1ea1o. Ch\u1ec9 c\u00f3 \u0111\u1ecba ch\u1ec9 IP th\u00ec g\u1ea7n nh\u01b0 kh\u00f4ng th\u1ec3 bi\u1ebft m\u1ed9t trang thu\u1ed9c v\u1ec1 ai, v\u00e0 k\u1ebb gian d\u1ec5 gi\u1ea3 l\u00e0m trang c\u1ee7a t\u1ed5 ch\u1ee9c kh\u00e1c h\u01a1n.<\/p>\n\n\n\n

Ng\u01b0\u1ee3c l\u1ea1i, ch\u00ednh v\u00ec t\u00ean mi\u1ec1n quan tr\u1ecdng, k\u1ebb l\u1eeba \u0111\u1ea3o hay \u0111\u0103ng k\u00fd t\u00ean g\u1ea7n gi\u1ed1ng th\u01b0\u01a1ng hi\u1ec7u th\u1eadt (thay m\u1ed9t ch\u1eef c\u00e1i, th\u00eam d\u1ea5u g\u1ea1ch n\u1ed1i). Tr\u01b0\u1edbc khi nh\u1eadp th\u00f4ng tin, h\u00e3y ki\u1ec3m tra k\u1ef9 t\u00ean mi\u1ec1n; c\u00e1ch tra ch\u1ee7 s\u1edf h\u1eefu c\u00f3 \u1edf b\u00e0i ki\u1ec3m tra ch\u1ee7 s\u1edf h\u1eefu t\u00ean mi\u1ec1n<\/a>.<\/p>\n\n\n\n

\u00dd ngh\u0129a c\u1ee7a m\u1ed9t s\u1ed1 \u0111u\u00f4i t\u00ean mi\u1ec1n ph\u1ed5 bi\u1ebfn<\/h2>\n\n\n\n

Ph\u1ea7n \u0111u\u00f4i cho bi\u1ebft nh\u00f3m c\u1ee7a t\u00ean mi\u1ec1n: \u0111u\u00f4i chung to\u00e0n c\u1ea7u, \u0111u\u00f4i qu\u1ed1c gia ho\u1eb7c \u0111u\u00f4i d\u00e0nh cho l\u0129nh v\u1ef1c. \u00dd ngh\u0129a ban \u0111\u1ea7u c\u1ee7a nhi\u1ec1u \u0111u\u00f4i nay ch\u1ec9 c\u00f2n l\u00e0 th\u00f3i quen s\u1eed d\u1ee5ng, kh\u00f4ng ph\u1ea3i \u0111i\u1ec1u ki\u1ec7n \u0111\u0103ng k\u00fd.<\/p>\n\n\n\n