Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong ngang » cong nhan, cong lang, cong nong
cong quang » luong quang, thong quang, duong quang
doi chieu » doc hieu, doi chi, ho chieu
hanh hang » thanh hang, hang hang, hanh han
va thong » va thuong, va phuong, he thong
tuan cau » toan cau, quan cau, thuan cam
tuan cu » tuan tu, quan cua, tuan thu

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 hang va thong ((cong ngang) OR (cong quang)) ((tuan cau) OR (tuan cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh hang va thong ((cong ngang) or (cong quang)) ((tuan cau) OR (tuan cu))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh hang va thong ((cong ngang) or (cong quang)) ((tuan cau) OR (tuan cu))*.