/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: loanphuong395 https://cdn.slidesharecdn.com/profile-photo-loanphuong395-48x48.jpg?cb=1523456525 Khi má»™t cánh cá»­a đóng lại sẽ có má»™t cách cá»­a khác mở ra <3