Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
nhung cong » dung cong, thong cong, hang cong
hanh dung » thanh dung, anh dung, hanh dong
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » hoc thieu, doi chieu, mot chieu
dung cua » dung luan, dung cho
dan toan » van toan, dan than, xuan toan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - hanh dung cua nhung cong ((dan toan) OR (manh toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) sach - hanh dung cua nhung cong ((dan toan) or (manh toan)) cau*.