Some ethnics such as Van Kieu, Ta oi, Co tu, Paco, Pahy the rate of the A blood group 22.92% - 26.98% - 18.23% - 19.05% - 15.45% and their rate of the B blood group was 39.92% - 33.33% - 33.70 - 36.90% - 38.18% respectively.