Xo so kien thiet mien Bac - so xo mb thu 2 - day la loai hinh xo so truyen thong duoc nha nuoc cho phep nguoi dan tham gia, voi hinh thuc mua ve cong khai. Cac loai ve duoc phat hanh duoi su quan ly cua CTXSKT Thu do. Xem them tai: https://ketquasieuvip.com/xsmb-thu-2/