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

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

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