Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
long cong » luong cong, cong cong, tong cong
cong vang » cong lang, cong quang, cong ngang
phan dau » phan tu, hang dau
van dau » van dao

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 - hanh ((trinh quan) or (tinh quang)) long cong vang ((van dau) OR (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((trinh quan) OR (tinh quang)) long cong vang ((van dau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((trinh quan) or (tinh quang)) long cong vang ((van dau) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trinh quan) or (tinh quang)) long cong vang ((van dau) OR (phan dau))*.