Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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 ((chieu xanh) OR (chieu sach)) - canh tranh cua nhung cong ((dan toan) OR (van toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sach)) - canh tranh cua nhung cong ((dan toan) OR (van toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sach)) - canh tranh cua nhung cong ((dan toan) OR (van toan)) cao*.