Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
dung nhung » dung chung, dung nhan, dung ung
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
thanh ung » thanh tung, thanh hung, thanh dung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van 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: hoc ((chieu sang) or (hieu lang)) - thanh ung dung nhung cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - thanh ung dung nhung cong dan than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - thanh ung dung nhung cong dan than cap*.