Perhaps you should try some spelling variations:
thanh tung » thanh cong
gap trong » ap trong, gay trong, lap trong
cong bang » cuong bang, dong bang, hong bang
bang than » bang thanh, ban than, sang than
theo cau » theo chu, theo cap, theo dau
cau sach » cao sach, hau sach, rau sach
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 sach - ((thanh trung) or (thanh tung)) gap trong cong bang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo cau sach - ((thanh trung) OR (thanh tung)) gap trong cong bang than cau.
• Adding a wildcard symbol may retrieve word variants: theo cau sach - ((thanh trung) or (thanh tung)) gap trong cong bang than cau*.