/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: TanDao1 https://cdn.slidesharecdn.com/profile-photo-TanDao1-48x48.jpg?cb=1613857606 Ä‘Æ¡n giản nhÆ°ng vô cùng phức tạp! :D