Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
toc chieu » toc thieu, doc hieu, hoc thieu
hanh tang » hanh trang, anh tang, hanh mang
tdung dat » trung dai, vung dat, dong dat
tang dan » tang van, tung dan, tang luan
dan dung » van dung, tin dung, ap dung
dung dat » dung va, dung tai

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: toc chieu sach - hanh tang dan dung ((tdung dat) OR (dung dat)) phan tu~.
• Adding a wildcard symbol may retrieve word variants: toc chieu sach - hanh tang dan dung ((tdung dat) or (dung dat)) phan tu*.