Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
toc hieu » toc thieu, hoc thieu, thuc hieu
doc hieu » toc thieu, hoc thieu, hoc hien
van toan » van tuan, van tan, van thanh
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: ((toc hieu) OR (doc hieu)) manh - hanh doanh luan ((nhung cong) or (hang cong)) van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc hieu) OR (doc hieu)) manh - hanh doanh luan ((nhung cong) OR (hang cong)) van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc hieu) OR (doc hieu)) manh - hanh doanh luan ((nhung cong) or (hang cong)) van toan cao".
• Adding a wildcard symbol may retrieve word variants: ((toc hieu) OR (doc hieu)) manh - hanh doanh luan ((nhung cong) or (hang cong)) van toan cao*.