/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: VanPham5 https://cdn.slidesharecdn.com/profile-photo-VanPham5-48x48.jpg?cb=1523191579 cái gì càng Ä‘Æ¡n giản càng tốt !!!!!!!