Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
chi sach » chinh sach, chieu sach, co sach
luan ung » luan hung, luon ung, luan chung
lan hung » van hung, luan chung, lan phuong
cong san » cong tac
toan cao » toan ban, toan tap
doi chi » doi khi

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 sach - canh tranh ((luan ung) or (lan hung)) ((cong san) or (cong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - canh tranh ((luan ung) OR (lan hung)) ((cong san) OR (cong thanh)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - canh tranh ((luan ung) or (lan hung)) ((cong san) or (cong thanh)) toan cao*.