Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh dong » anh dong, ha dong
ho chieu » theo chieu, hoc thieu, doi chieu
dong cua » dung cua, cong cua, huong cua
ban cong » bang cong, van cong, phan cong
tap toan » tap doan, tap quan
bai toan » bai tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh dong cua ban cong ((tap toan) or (bai toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh dong cua ban cong ((tap toan) OR (bai toan)) cau*.