Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
tuan thanh » thuan thanh, quan thanh, tran thanh
thanh van » thanh san, thanh toan, thanh phan
tranh va » tranh van, trang va, trinh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chiet tach) or (chinh sach)) - canh tranh va ((nhung cong) OR (thong cong)) tuan thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (chinh sach)) - canh tranh va ((nhung cong) OR (thong cong)) tuan thanh van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chiet tach) or (chinh sach)) - canh tranh va ((nhung cong) OR (thong cong)) tuan thanh van".
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (chinh sach)) - canh tranh va ((nhung cong) OR (thong cong)) tuan thanh van*.