Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 - canh trinh va ((nhung cong) or (thong thong)) dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh trinh va ((nhung cong) OR (thong thong)) dan chan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh trinh va ((nhung cong) or (thong thong)) dan chan cau*.