Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thanh cham » thanh pham, thanh cha, hanh cham
tieu sang » chieu sang, tieu dung, tiem nang
trung hoc » trung quoc
van thanh » ban thanh, van tuan
trung ha » trung tam, trung cap
cong van » cong vang, cong san, song van

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 - thanh ((trung ha) or (trung hoc)) nhung cong van thanh cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - thanh ((trung ha) OR (trung hoc)) nhung cong van thanh cham.
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - thanh ((trung ha) or (trung hoc)) nhung cong van thanh cham*.