Ch\u01b0\u01a1ng I – B\u00e0i 21: Th\u1ef1c h\u00e0nh: \u0110o m\u1ed9t s\u1ed1 ch\u1ec9 ti\u00eau sinh l\u00ed \u1edf ng\u01b0\u1eddi<\/a><\/blockquote><\/iframe>