Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
trung tan » trung tuan, trung tran, trung tang
cong bang » cuong bang, dong bang, hong bang
tan dung » tran dung, tin dung, van dung
cong ban » cong san, cong tan, cong dan
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: hoc thien hach - thanh trung tan dung ((cong ban) or (cong bang)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - thanh trung tan dung ((cong ban) OR (cong bang)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - thanh trung tan dung ((cong ban) or (cong bang)) than cau*.