Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
duong cong » dung cong, luong cong, duong trong
tranh cua » doanh cua, manh cua
dong cong » dung cong, dang cong, cong cong
san van » tan van, luan van, tran van

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 tinh)) - hanh tranh cua ((dong cong) OR (duong cong)) san van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu tinh)) - hanh tranh cua ((dong cong) OR (duong cong)) san van ban~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu tinh)) - hanh tranh cua ((dong cong) OR (duong cong)) san van ban*.