Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh doanh » hang doanh, chinh doanh, doanh doanh
nhung cong » thong cong, hang cong, nhung don
hieu lang » chieu sang, nhieu tang, hieu van
doanh cua » doanh luan
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
toan cau » toan cao, toan ban, toan tap

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 lang) OR (hieu quang)) - hanh doanh cua ((nhung cong) or (dung cong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (hieu quang)) - hanh doanh cua ((nhung cong) OR (dung cong)) manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu lang) OR (hieu quang)) - hanh doanh cua ((nhung cong) or (dung cong)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) OR (hieu quang)) - hanh doanh cua ((nhung cong) or (dung cong)) manh toan cau*.