Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh trong » hanh trang, anh trong, hinh trong
quang dung » quang trung, ung dung, cuong dung
trong tan » trong quan, trong cac, trong ca
qua dung » su dung, qua song, qua cong
tan van » tran van, tang van, luan van

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)) - hanh trong ((qua dung) or (quang dung)) trong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - hanh trong ((qua dung) OR (quang dung)) trong tan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (chiet tach)) - hanh trong ((qua dung) or (quang dung)) trong tan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (chiet tach)) - hanh trong ((qua dung) or (quang dung)) trong tan van ban*.