http://fcwordpress.net/cac-cach-lay-anh-dai-dien-thumbnail-trong-wordpress.html
https://codex.wordpress.org/Function_Reference/the_post_thumbnail_url
http://nhanweb.com/su-dung-hinh-anh-trong-bai-de-lam-thumbnail.html
http://wordpress.taisao.vn/2078/nhan-url-post-thumbnail-trong-wordpress
http://gockinhnghiem.com/2011/11/21/lay-thumbnail-cua-bai-post/
https://satthu.wordpress.com/2011/09/15/code-t%E1%BB%B1-d%E1%BB%99ng-l%E1%BA%A5y-%E1%BA%A3nh-thumbnail-trong-wordpress/
http://itkhongkho.xyz/2015/10/26/huong-dan-cai-dat-tinh-chinh-theme-tin-tuc-colormag/
Theme miễn phí :
http://themegrill.com/blog/free-responsive-wordpress-themes/
http://thachpham.com/wordpress/themes-wordpress/28-theme-mien-phi-thang-7-2016.html
https://codex.wordpress.org/Function_Reference/the_post_thumbnail_url
http://nhanweb.com/su-dung-hinh-anh-trong-bai-de-lam-thumbnail.html
http://wordpress.taisao.vn/2078/nhan-url-post-thumbnail-trong-wordpress
http://gockinhnghiem.com/2011/11/21/lay-thumbnail-cua-bai-post/
https://satthu.wordpress.com/2011/09/15/code-t%E1%BB%B1-d%E1%BB%99ng-l%E1%BA%A5y-%E1%BA%A3nh-thumbnail-trong-wordpress/
http://itkhongkho.xyz/2015/10/26/huong-dan-cai-dat-tinh-chinh-theme-tin-tuc-colormag/
Theme miễn phí :
http://themegrill.com/blog/free-responsive-wordpress-themes/
http://thachpham.com/wordpress/themes-wordpress/28-theme-mien-phi-thang-7-2016.html