Bai 54 Luyen Tap Chung

Bai 46 Khoi Tru, Khoi Cau

Bai 73 On Tap Do Luong

Bai 52 Viet So Thanh Tong Cac Tram Chuc Don Vi

Bai 38 Thua So Tich

Bai 66 Lua Chon Kha Nang

Bai 44 Bang Chia 5

Bai 59 Phep Cong Khong Nho Trong Pham Vi 1000

Bai 37 Phep Nhan

Bai 55 De Xi Met, Met, Ki Lo Met

Bai 70 On Tap Phep Cong Phep Tru Trong Pham Vi 1000

Bai 39 Bang Nhan2