Perhaps you should try some spelling variations:
mot chieu » doi chieu, ho chieu
hoc thieu » toc thieu, hoc hien
hanh dung » thanh dung, anh dung, hanh dong
luan cong » luat cong, luong cong, luan chung
cong cong » cong dong, trong cong, dung cong
pham toan » pham tuan, pham tan, phap toan
tac toan » tap toan, tam toan, hach toan

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

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