Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, nhieu tang, biet lang
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
hieu van » hieu va, thien van, lieu va
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac

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