Perhaps you should try some spelling variations:
doanh thanh » danh thanh, doanh nhan, dinh thanh
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » dung cong, thong cong, hang cong
cong doanh » cong danh, cong doan, dong doanh
hieu sang » chieu sang, hieu lang, nhieu tang
lanh manh » lanh tranh, lan anh, van manh
thanh tu » hanh tu, nhanh tu, thanh tung
manh va » hanh va, anh va, minh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sang) or (hieu quang)) - lanh manh va nhung cong doanh thanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sang) OR (hieu quang)) - lanh manh va nhung cong doanh thanh tu.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sang) or (hieu quang)) - lanh manh va nhung cong doanh thanh tu*.