Perhaps you should try some spelling variations:
hien nganh » vien nganh, hien nhanh, hieu nganh
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, nhung don
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nganh - hanh tranh cua ((nhung cong) OR (hang cong)) ((dan than) OR (ban than)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc hien nganh - hanh tranh cua ((nhung cong) or (hang cong)) ((dan than) or (ban than)) cau*.