/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: tuanhoanganh9250595 https://public.slidesharecdn.com/v2/images/profile-picture.png http://www.youtube.com/watch?v=5SFRNnbZYTE&list=PLA88D5C191CCAB31F&index=66 cách làm thiệp