/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: tuanphuc56 https://public.slidesharecdn.com/v2/images/profile-picture.png BÆ°á»›c thật chậm nhÆ°ng không dừng bÆ°á»›c.