Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
luan trong » luat trong, luan tuong, luong trong
quan trong » gian trong
doi chieu » doc hieu, doi chi, mot chieu
cong hoan » cong hoa, dong hoa, cong san
hoan phan » hoa phan, toan phan, doan phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - dinh thanh ((luan trong) OR (quan trong)) cong hoan phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - dinh thanh ((luan trong) OR (quan trong)) cong hoan phan tu".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - dinh thanh ((luan trong) OR (quan trong)) cong hoan phan tu*.