Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
trung co » trung bo, trong co, truong cao
cong van » cong vang, song van, cong tan
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
co bang » cao bang, con bang, co ban

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 - thanh trung co bang ((cong van) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - thanh trung co bang ((cong van) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh trung co bang ((cong van) or (cong san)) toan cau*.