/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: GuFeeLay https://public.slidesharecdn.com/v2/images/profile-picture.png သá¶Ä­á¶Ä˜á¶Ä°á¶Ä¸