Perhaps you should try some spelling variations:
trung doanh » trong doanh, trung thanh, dung doanh
hieu quang » thieu quang, hieu quan, hieu qua
manh trung » manh tung, thanh trung, manh hung
chong cong » thong cong, cuong cong, phong cong
cong cong » cong dong, trong cong, dung cong
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu quang - manh trung doanh ((chong cong) or (cong cong)) tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quang - manh trung doanh ((chong cong) OR (cong cong)) tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - manh trung doanh ((chong cong) or (cong cong)) tinh toan ban*.