Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hiem ngan » kim ngan, viem gan
hang cong » dang cong, hang nong, bang cong
trang va » tran van, hang va
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan dau » phan tu, hang dau
va hang » van hang, va nang, va lang

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 manh) or (hiem ngan))) or (trieu tinh)) - hanh trang va hang cong tac phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (hiem ngan))) OR (trieu tinh)) - hanh trang va hang cong tac phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) or (hiem ngan))) or (trieu tinh)) - hanh trang va hang cong tac phan dau*.