/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: TNNgoc https://cdn.slidesharecdn.com/profile-photo-TNNgoc-48x48.jpg?cb=1523403906 lằng nhằng , rắc rối, vá»› vẩn :))