B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: S\u00f3ng c\u01a1 v\u00e0 s\u1ef1 truy\u1ec1n s\u00f3ng c\u01a1 (ph\u1ea7n 2)<\/a><\/blockquote><\/iframe>