/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: NaDuck https://public.slidesharecdn.com/v2/images/profile-picture.png tá»± tìm hiểu Ä‘i... nhÆ° thế thú vị hÆ¡n đó ;;)