Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
hieu lang » nhieu tang, hieu van, biet lang
dang cong » dung cong
tung cua » trung cua, tuong cua, dung cua
cua dang » cua cong, cua ban
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 (chieu sang))) or (hieu quang)) - thanh tung cua dang cong tan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu lang) OR (chieu sang))) OR (hieu quang)) - thanh tung cua dang cong tan than cap.
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu lang) or (chieu sang))) or (hieu quang)) - thanh tung cua dang cong tan than cap*.