Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
lanh tranh » lan tranh, hanh trinh, sach tranh
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 - ((lanh tranh) OR (canh tranh)) cua nhung cong dan toan cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((lanh tranh) or (canh tranh)) cua nhung cong dan toan cau*.