Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung huong » dung thuong, dung phuong, dong huong
hoc chieu » hoc thieu, ho chieu, hoc hien
trong van » trong cac
huong tam » duong tam, huong tac, huong tran
tam toan » tap toan, tam than, pham toan
toan ban » van ban
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh ((trong van) or (luan van)) dung huong tam toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trong van) OR (luan van)) dung huong tam toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trong van) or (luan van)) dung huong tam toan ban*.