Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
cong van » cong vang, cong san, song van
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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

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