xin moi cac ban vao xem o+?:
http://www.ifrance.com/NguyenXuanSon/LopLy2/LopLy2.htm
http://www.ifrance.com/NguyenXuanSon/LopLyCu2/LopLyCuaToi.htm
Nguyen Xuan Son
http://www.ifrance.com/NguyenXuanSon/LopLy2/LopLy2.htm
http://www.ifrance.com/NguyenXuanSon/LopLyCu2/LopLyCuaToi.htm
Nguyen Xuan Son