Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
nhung song » nhung cong, nhung bong, nhung chong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
song van » hoang van, trong van, duong van
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - canh trinh va nhung song van ((phan cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - canh trinh va nhung song van ((phan cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh trinh va nhung song van ((phan cau) or (phan cac))*.