<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebSite>
<https://www.chotot.com/quan-thu-duc/mua-ban-may-tinh-laptop/laptop-dell-6890-i5-the-he-3-ram-4g-vga-4000-hdd-3-28463947.htm>