Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
luan thong » luan phong, luan tuong, xuan thong
luat thong » luat thuong, suat thong, xuat thong
hieu lang » hieu quang, nhieu tang, hieu van
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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

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