Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
toc chieu » toc thieu, doc hieu, hoc thieu
tran dang » tran quang, tran hoang, tranh hang
tdung dat » trung dai, vung dat, dong dat
dung dat » dung va, dung tai
dang da » dang dan, dang do, dong da
da dung » dan dung, dat dung, da dang

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 - tran dang da dung ((tdung dat) or (dung dat)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu sach - tran dang da dung ((tdung dat) OR (dung dat)) phan tu.
• Adding a wildcard symbol may retrieve word variants: toc chieu sach - tran dang da dung ((tdung dat) or (dung dat)) phan tu*.