/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: khongcai5 https://public.slidesharecdn.com/v2/images/profile-picture.png dù có bao nhiêu tuổi thì t hứa vẫn mãi là trẻ con :))))))