ºÝºÝߣshows by User: nguyentvan100 / http://www.slideshare.net/images/logo.gif ºÝºÝߣshows by User: nguyentvan100 / ºÝºÝߣShare feed for ºÝºÝߣshows by User: nguyentvan100 https://cdn.slidesharecdn.com/profile-photo-nguyentvan100-48x48.jpg?cb=1523377040 Út nhÃ