/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: thuanthu https://cdn.slidesharecdn.com/profile-photo-thuanthu-48x48.jpg?cb=1523435591 lúc thế này , lúc thế khác = > khó diá»…n tả lắm ;))