/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: HongCng4 https://cdn.slidesharecdn.com/profile-photo-HongCng4-48x48.jpg?cb=1523417788 3C = Cần cù + Chịu khó + Chính xác