Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
hoi hieu » hoi phieu, hoi tieu, moi hieu
cua dang » cua cong, cua ban
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac
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 dang cong dan ((than cap) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - thanh trung cua dang cong dan ((than cap) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh trung cua dang cong dan ((than cap) or (phan dau))*.