Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu xanh » chieu sach, chieu sang, chieu tinh
cong thanh » dong thanh, cong trinh, cong tan
thien anh » thien danh, tien anh, thien thanh
trong san » trong cac, cong san, dong san
san dung » van dung, dan dung, lan dung
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (thien anh)) - thanh trong san dung ((cong tac) or (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (thien anh)) - thanh trong san dung ((cong tac) OR (cong thanh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien anh)) - thanh trong san dung ((cong tac) or (cong thanh)) toan cau*.