Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
hieu lang » chieu sang, hieu quang, nhieu tang
cong doan » cong dan, cong hoan, dong doanh
doi hieu » doi chieu, doc hieu, doi hien
thang tu » thong tu, thanh tu, hang tu
cong tan » cong tac, cong san, cong thanh
quan lap » quan luan, quang lam, quan lang
tu cong » thu cong, te cong, tai cong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh thang tu cong ((cong doan) or (cong tan)) quan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh thang tu cong ((cong doan) OR (cong tan)) quan lap.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh thang tu cong ((cong doan) or (cong tan)) quan lap*.