Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
chieu sach » chinh sach, chiet tach, chieu sang
doanh luan » doanh nhan
thong cong » trong cong, tong cong, phong chong
hieu lang » chieu sang, hieu quang, nhieu tang
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 sach) or (hieu lang)) - chinh doanh luan ((thong cong) or (thong thong)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (hieu lang)) - chinh doanh luan ((thong cong) OR (thong thong)) van toan ban.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sach) or (hieu lang)) - chinh doanh luan ((thong cong) or (thong thong)) van toan ban*.