Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh dung » thanh duong, thanh tung, thanh hung
hieu lang » hieu quang, nhieu tang, hieu van
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
cong danh » cuong danh, cong dan, cong thanh
danh van » doanh van, dang van, dinh van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (chieu sang)) - thanh dung luan dang cong danh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sang)) - thanh dung luan dang cong danh van ban.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu sang)) - thanh dung luan dang cong danh van ban*.