Perhaps you should try some spelling variations:
tieu sang » chieu sang, tieu dung, tiem nang
dung cong » dung trong
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - manh ((trung va) or (trung ha)) dung cong ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - manh ((trung va) OR (trung ha)) dung cong ban than cau*.