Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trong » hanh trang, anh trong, hinh trong
lang trong » dung trong, cong trong, dong trong
doi chieu » doc hieu, doi chi, mot chieu
cach dung » sach dung, cach mang, tac dung
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - ((hanh trong) or (lang trong)) cach dung cong tan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hanh trong) OR (lang trong)) cach dung cong tan phan tu*.