K\u1ebft lu\u1eadn<\/strong><\/h3>\n\u0110\u1ec3 tr\u00e1nh t\u00ecnh tr\u1ea1ng mua ph\u1ea3i s\u1ea3n ph\u1ea9m k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng, ng\u01b0\u1eddi ti\u00eau d\u00f9ng n\u00ean t\u00ecm hi\u1ec3u k\u1ef9 gi\u00e1 c\u1ea3 v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a c\u00e1c lo\u1ea1i y\u1ebfn s\u00e0o tr\u00ean th\u1ecb tr\u01b0\u1eddng.<\/p>\n