Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
chieu sach » chinh sach, chieu sang, chieu xanh
dung chung » dung cong, dung trung, truong chung
doanh cua » doanh luan
dung ung » dung cong
dan phan » doan phan, dan chan, van phan
phan tap » phan lap, han tap, pha tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chiet tach)) - doanh doanh cua ((dung chung) or (dung ung)) dan phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - doanh doanh cua ((dung chung) OR (dung ung)) dan phan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - doanh doanh cua ((dung chung) or (dung ung)) dan phan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - doanh doanh cua ((dung chung) or (dung ung)) dan phan tap*.