Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chai tinh » chau tinh, thai tinh, cham tinh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
chi tinh » chi minh, chi binh, cha tinh
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi tinh) or (chai tinh)) - canh tranh cua nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi tinh) OR (chai tinh)) - canh tranh cua nhung cong san van ban.
• Adding a wildcard symbol may retrieve word variants: doi ((chi tinh) or (chai tinh)) - canh tranh cua nhung cong san van ban*.