Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, mot chieu
tang cua » mang cua, hang cua, tang luan
dan toan » van toan, dan than, xuan toan

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