Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
doi viet » dai viet, hoi viet, oi viet
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
doi chi » doi khi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi viet) OR (doi chi)) tach - canh tranh cua nhung cong ((dan toan) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi viet) or (doi chi)) tach - canh tranh cua nhung cong ((dan toan) OR (van toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((doi viet) or (doi chi)) tach - canh tranh cua nhung cong ((dan toan) OR (van toan)) cau*.