/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: duongmai5 https://public.slidesharecdn.com/v2/images/profile-picture.png Ng��y h担m nay l�� m畛�t cu畛�c s畛�ng m畛�i, v畉�y s畛�ng sao cho tr畛�n v畉�n m畛�t ng��y h担m nay?