Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hanh dong » anh dong, ha dong
luan hung » luan chung, lan hung, tuan hung
luan ung » luon ung, luan chung, luan luong
tang tai » hang tai, dung tai, dong tai
sang tao » hang tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh dong ((luan hung) OR (luan ung)) cong ((tang tai) OR (sang tao)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh dong ((luan hung) or (luan ung)) cong ((tang tai) OR (sang tao)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh dong ((luan hung) or (luan ung)) cong ((tang tai) OR (sang tao)) cau*.