Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan ung » luan hung, luon ung, luan chung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (dieu hanh)) - hanh tang luan ung ((cong dan) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (dieu hanh)) - hanh tang luan ung ((cong dan) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (dieu hanh)) - hanh tang luan ung ((cong dan) or (cong san)) toan cau*.