Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
toc chieu » toc thieu, doc hieu, hoc thieu
dan canh » van canh, dan cach, dan hanh
canh dan » canh van, sanh dan, thanh 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: toc chieu sach - dan canh dan dung ((dong dat) or (dung dat)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu sach - dan canh dan dung ((dong dat) OR (dung dat)) phan tu.
• Adding a wildcard symbol may retrieve word variants: toc chieu sach - dan canh dan dung ((dong dat) or (dung dat)) phan tu*.