Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cap » truong cao, trung tam
trung va » truong va, trang va, trung ha
cong san » cong tac
ho hieu » ho chieu, hoi hieu, nho hieu
can cau » van cau, ca cau, cac cau
ban cau » bang cau, ban can, van cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh ((trung va) OR (trung cap)) nhung cong san ((can cau) OR (ban cau))~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((trung va) or (trung cap)) nhung cong san ((can cau) or (ban cau))*.