/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: NgYn1 https://cdn.slidesharecdn.com/profile-photo-NgYn1-48x48.jpg?cb=1523250880 chẳng có chi để giá»›i thiệu cả,