/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: DuyennguyenNguyenduyen https://cdn.slidesharecdn.com/profile-photo-DuyennguyenNguyenduyen-48x48.jpg?cb=1523219494 Tá»± do, tu tai