Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
hoi hieu » hoi phieu, hoi tieu, moi hieu
tung cua » tuong cua, dung cua, tang cua
cong san » cong tac
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - thanh ((tung cua) or (trung cua)) nhung cong san ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - thanh ((tung cua) OR (trung cua)) nhung cong san ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh ((tung cua) or (trung cua)) nhung cong san ((than cau) or (phan cau))*.