Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
quang dung » quang trung, ung dung
cuong dung » tuong duong, ung dung, thong dung
doi chieu » doc hieu, doi chi, ho chieu
cong luan » tong luan, cong tuan, dong luan
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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 - canh trinh ((quang dung) OR (cuong dung)) cong luan ((phan cau) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - canh trinh ((quang dung) OR (cuong dung)) cong luan ((phan cau) or (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - canh trinh ((quang dung) OR (cuong dung)) cong luan ((phan cau) or (phan dau))*.