\u0110\u0103ng k\u00fd 2 b\u00e0i t\u1ed5 h\u1ee3p nh\u01b0ng ch\u1ec9 thi 1 c\u00f3 b\u1ecb \u0111\u00e1nh tr\u01b0\u1ee3t t\u1ed1t nghi\u1ec7p kh\u00f4ng?<\/a><\/blockquote><\/iframe>