Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thanh dong » thanh duong, thanh cong, hanh dong
hieu manh » chieu xanh, hieu nganh, dieu hanh
thien anh » thien danh, tien anh, thien thanh
dong san » cong san, dong bang, dong von
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 ((hieu manh) or (thien anh)) - thanh dong san dung ((cong tac) or (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (thien anh)) - thanh dong san dung ((cong tac) OR (cong thanh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien anh)) - thanh dong san dung ((cong tac) or (cong thanh)) toan cau*.