/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: NguynHng47 https://cdn.slidesharecdn.com/profile-photo-NguynHng47-48x48.jpg?cb=1523480918 Luôn luôn lắng nghe, lâu lâu má»›i hiểu !