Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
doc chieu » doc hieu, doi chieu, toc thieu
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
toan tap » toan ban

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: doc chieu xanh - hanh tranh va nhung cong dan ((((than cau) OR (toan tap))) OR (phan tu))~.
• Adding a wildcard symbol may retrieve word variants: doc chieu xanh - hanh tranh va nhung cong dan ((((than cau) or (toan tap))) or (phan tu))*.