/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: hauyen37 https://public.slidesharecdn.com/v2/images/profile-picture.png không quá ồn ào,đôi lúc chẳng nhẹ nhàng,lại trầm mặc,có khi lại náo nhiệt.it's me