Perhaps you should try some spelling variations:
cong doanh » cong danh, cong doan, rong doanh
dong doanh » dung doanh, trong doanh, doanh doanh
hieu sang » chieu sang, hieu lang, hieu quang
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
manh cua » doanh cua, ban cua
thanh tu » hanh tu, nhanh tu, thanh tung

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 - lanh manh cua nhung ((cong doanh) OR (dong doanh)) thanh tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sang - lanh manh cua nhung ((cong doanh) OR (dong doanh)) thanh tu".
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - lanh manh cua nhung ((cong doanh) OR (dong doanh)) thanh tu*.