/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: muoimuoi5895 https://public.slidesharecdn.com/v2/images/profile-picture.png rụt rè nhut nhát:'( đôi khi Ä‘iên đến khó hiểu :))