Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
doc chieu » doc hieu, doi chieu, toc thieu
trang dan » trang doan, tang dan, trong dan
dan dung » van dung, tin dung, ap dung
dong dat » dong vat, dong ha, dong tai
dung dat » dung va, dung tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc chieu sach - hanh trang dan dung ((dong dat) or (dung dat)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu sach - hanh trang dan dung ((dong dat) OR (dung dat)) phan tu.
• Adding a wildcard symbol may retrieve word variants: doc chieu sach - hanh trang dan dung ((dong dat) or (dung dat)) phan tu*.