Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
canh doanh » hanh doanh, chinh doanh, kinh doanh
luan nhung » luan chung, quan nhung, luan phuong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
luan hung » luan chung, lan hung, luan ung
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - ((canh doanh) or (doanh doanh)) ((luan nhung) OR (luan hung)) cong tac phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((canh doanh) OR (doanh doanh)) ((luan nhung) OR (luan hung)) cong tac phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - ((canh doanh) or (doanh doanh)) ((luan nhung) OR (luan hung)) cong tac phan dau".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - ((canh doanh) or (doanh doanh)) ((luan nhung) OR (luan hung)) cong tac phan dau*.