Perhaps you should try some spelling variations:
hieu cach » hieu cac, chieu sach, hieu ca
ban tuong » ban huong, ban trong, va tuong
van luong » van duong, van cuong, nang luong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong lap » cong luan, cong lang, cong tac
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 cong lap ((ban tuong) or (van luong)) dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - thanh cong lap ((ban tuong) OR (van luong)) dan chan cau*.