Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong quang » luong quang, thong quang, duong quang
doi chieu » doc hieu, doi chi, ho chieu
cong lang » cong vang, cong luong, cong ngang
tranh su » trinh su, trang su, tranh cua
hoa mau » hoa may, hoa cau, hoa dau

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 - canh tranh su dung ((cong quang) or (cong lang)) hoa mau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh tranh su dung ((cong quang) OR (cong lang)) hoa mau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh su dung ((cong quang) or (cong lang)) hoa mau*.