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

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