Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
cong quang » luong quang, thong quang, duong quang
cong ngang » cong nhan, cong lang, cong nong
tam nhung » tham nhung, cam nhung, nam nhung
ho chieu » theo chieu, hoc thieu, doi chieu
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - ((thanh trung) OR (thanh tung)) tam nhung ((cong quang) or (cong ngang)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((thanh trung) OR (thanh tung)) tam nhung ((cong quang) OR (cong ngang)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((thanh trung) OR (thanh tung)) tam nhung ((cong quang) or (cong ngang)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((thanh trung) OR (thanh tung)) tam nhung ((cong quang) or (cong ngang)) phan cau*.