/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: nguyenvanvu3 https://cdn.slidesharecdn.com/profile-photo-nguyenvanvu3-48x48.jpg?cb=1523435956 ngu mà lì :) lì là số 1 :))