Perhaps you should try some spelling variations:
canh doanh » hanh doanh, chinh doanh, doanh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
luan hang » luan nang, luan hung, luan tang
san thanh » ban thanh, van thanh, son thanh
luan han » luan hoan, luan phan, luan van
cong san » cong tac
thanh ca » thanh cha, thanh cac, thanh ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (hieu lang)) - canh doanh ((luan hang) OR (luan han)) cong san thanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - canh doanh ((luan hang) OR (luan han)) cong san thanh ca.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - canh doanh ((luan hang) OR (luan han)) cong san thanh ca".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - canh doanh ((luan hang) OR (luan han)) cong san thanh ca*.