Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cong cong » cong dong, trong cong, dung cong
vang than » sang than, van than, cang thang
hoi hieu » hoi phieu, hoi tieu, moi hieu
than cap » khan cap, thanh lap, thanh cac

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: hoi hieu lang - thanh trung cua ((thong cong) OR (cong cong)) vang than cap~.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh trung cua ((thong cong) or (cong cong)) vang than cap*.