Perhaps you should try some spelling variations:
trung thanh » truong thanh
thuong cong » thong cong, thuong con, thuong dong
thanh chau » thanh cha, thanh cham, thanh chu
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
hoi hieu » hoi phieu, hoi tieu, moi hieu
cong dan » cong san, cong tan, huong dan
phan dau » phan tu, hang dau

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 ((trung cua) or (trung thanh)) thuong cong dan ((thanh chau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - thanh ((trung cua) OR (trung thanh)) thuong cong dan ((thanh chau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh ((trung cua) or (trung thanh)) thuong cong dan ((thanh chau) or (phan dau))*.