Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
anh tang » anh bang, anh dang, anh nang
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) OR (chiet tach)) - anh tang ((cua dung) or (qua dung)) cong ban than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - anh tang ((cua dung) OR (qua dung)) cong ban than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (chiet tach)) - anh tang ((cua dung) or (qua dung)) cong ban than cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (chiet tach)) - anh tang ((cua dung) or (qua dung)) cong ban than cao*.