Perhaps you should try some spelling variations:
vien nganh » vien thanh
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tan than » tan thanh, tan tran, tam than
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: hoc ((hieu manh) or (vien nganh)) - canh tranh cua nhung cong ((tan than) or (ban than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (vien nganh)) - canh tranh cua nhung cong ((tan than) OR (ban than)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (vien nganh)) - canh tranh cua nhung cong ((tan than) or (ban than)) cao*.