Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung dong » nhung don, nhung cong, nhung dung
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh sinh » hanh tinh, hanh dinh, hinh sinh
vat nhung » va nhung, vap nhung, vai nhung
than phap » than phan, phan phap, thanh phan
han phap » hanh phap, phan phap, ban phap

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: hoc chieu sach - hanh sinh vat nhung dong ((than phap) OR (han phap)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh sinh vat nhung dong ((than phap) or (han phap)) cau*.