Perhaps you should try some spelling variations:
cong ngang » cong nhan, cong quang, cong lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
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 cac, phan tu, phan lap
phan dau » phan tu, hang dau

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 manh - canh tranh cua nhung ((cong van) or (cong ngang)) ((phan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh tranh cua nhung ((cong van) OR (cong ngang)) ((phan cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh tranh cua nhung ((cong van) or (cong ngang)) ((phan cau) or (phan dau))*.