Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh trinh » canh tranh, hanh chinh
trinh san » trinh han, trinh quan, trinh toan
dung cong » dung trong
san dung » van dung, dan dung, tan dung
cong dan » cong san, cong tan, huong dan
van cau » van dau, van hau, van chat

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: theo ((chieu xanh) OR (chieu sang)) - hanh trinh san dung cong dan ((van cau) OR (phan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu sang)) - hanh trinh san dung cong dan ((van cau) or (phan tu))~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu sang)) - hanh trinh san dung cong dan ((van cau) or (phan tu))*.