/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: tranvanphu9 https://cdn.slidesharecdn.com/profile-photo-tranvanphu9-48x48.jpg?cb=1603547773 nhìn lên thì chẳng bầng ai, nhìn xuống thì chẳng thấy ai dÆ°á»›i mình