/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: anhvungoc1 https://public.slidesharecdn.com/v2/images/profile-picture.png FB này vungocanh ko sá»­ dụng nữa, nếu bạn muốn kết bạn thì vui lòng add fb fb.com/anh3187 :)