Perhaps you should try some spelling variations:
doanh doanh » doanh hoan, doanh thanh, dong doanh
hieu quang » thieu quang, hieu quan, hieu qua
hung luong » hung vuong, dung luong, hung cuong
hang luong » nang luong, hang thuong, hoang vuong
toan cao » toan ban, toan tap
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 - ((doanh doanh) or (toan doanh)) luan ((hung luong) OR (hang luong)) tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quang - ((doanh doanh) OR (toan doanh)) luan ((hung luong) OR (hang luong)) tinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu quang - ((doanh doanh) or (toan doanh)) luan ((hung luong) OR (hang luong)) tinh toan cao".
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - ((doanh doanh) or (toan doanh)) luan ((hung luong) OR (hang luong)) tinh toan cao*.