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
cua thong » cua thuong, cua khong, cua tong
cong van » cong vang, cong san, song van
than cap » khan cap, thanh lap, thanh cac
thanh ca » thanh cha, thanh cac, thanh ha
ho hieu » ho chieu, hoi hieu, nho hieu

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

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