/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: chuchin965 https://cdn.slidesharecdn.com/profile-photo-chuchin965-48x48.jpg?cb=1523478827 ít nói nhÆ°ng khi đã nói thì không ai hiểu