Tớ đang cô đơn lắm các bạn ạ.....:)
http://mp3.zing.vn/album/Tuyen-Tap-Nhac-Khong-Loi-Hay-Nhat-Various-Artists/ZWZA9EI8.html?st=3
http://www.tnu.edu.vn/sites/vinh-nt/Bi%20ging%20chia%20s/vinhc4.pdf
http://cnetvn.com/2013/03/02/cach-tao-bang-khao-sat-truc-tuyen-bang-google-docs/