Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tuan
thanh tra » thanh toan, thanh hoa
xuan dang » xuan nang, xuan cang, tuan dang
dang cong » dung cong
theo cau » theo chu, theo cap, theo dau
cau sach » cao sach, hau sach, rau sach
cong van » cong vang, cong san, song van
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo cau sach - ((thanh tran) OR (thanh tra)) xuan dang cong van ((phan cau) OR (phan cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo cau sach - ((thanh tran) or (thanh tra)) xuan dang cong van ((phan cau) OR (phan cac))~".
• Adding a wildcard symbol may retrieve word variants: theo cau sach - ((thanh tran) or (thanh tra)) xuan dang cong van ((phan cau) OR (phan cac))*.