Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
dieu danh » tieu danh, dia danh, dien anh
tranh van » tran van, trinh van, thanh van
van nhung » van nhuong, va nhung, van hung
dan toan » van toan, dan than, manh toan
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((dieu danh) OR (dieu hanh)) - canh tranh van nhung cong ((dan toan) or (ban than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((dieu danh) OR (dieu hanh)) - canh tranh van nhung cong ((dan toan) OR (ban than)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((dieu danh) OR (dieu hanh)) - canh tranh van nhung cong ((dan toan) or (ban than)) ban*".