Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
tuan dung » tuan duong, tran dung, tan dung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
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 - ((thanh trung) OR (thanh tung)) tuan dung ((cong tan) OR (cong tac)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - ((thanh trung) or (thanh tung)) tuan dung ((cong tan) OR (cong tac)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((thanh trung) or (thanh tung)) tuan dung ((cong tan) OR (cong tac)) toan cau*.