Perhaps you should try some spelling variations:
thanh tung » thanh cong
tong cong » trong cong, cong cong, dung cong
cong bang » cuong bang, dong bang, hong bang
bang than » bang thanh, ban than, sang than
theo cau » theo chu, theo dau, theo mau
theo cap » theo phap, pho cap, theo chu
cap tong » cap nong, cap hoang, gap trong
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo cau) OR (theo cap)) sach - ((thanh trung) or (thanh tung)) cap tong cong bang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo cau) OR (theo cap)) sach - ((thanh trung) OR (thanh tung)) cap tong cong bang than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo cau) OR (theo cap)) sach - ((thanh trung) or (thanh tung)) cap tong cong bang than cau".
• Adding a wildcard symbol may retrieve word variants: ((theo cau) OR (theo cap)) sach - ((thanh trung) or (thanh tung)) cap tong cong bang than cau*.