Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu cach » hieu cac, chieu sach, hieu ca
cap hoang » cam hoang, cau hoang, van hoang
hoc hieu » hoc thieu, hoc hien, doc hieu
cap hang » cap bang, cap han, cau thang
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
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 hieu cach - ((thanh trung) or (thanh tung)) ((cap hang) or (cap hoang)) cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - ((thanh trung) OR (thanh tung)) ((cap hang) OR (cap hoang)) cong tan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - ((thanh trung) or (thanh tung)) ((cap hang) or (cap hoang)) cong tan than cau*.