<http://www.tienducchauson.net/2015/03/31/viet-la%cc%a3i-cuo%cc%a3c-xu%cc%89-an-cu%cc%89a-chung-ta/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://www.tienducchauson.net/2015/03/31/viet-la%CC%A3i-cuo%CC%A3c-xu%CC%89-an-cu%CC%89a-chung-ta/>