Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
hanh manh » hanh mang, lanh manh, hoang manh
cua nhung » va nhung
manh cua » doanh cua, ban cua
dan toan » van toan, dan than, manh toan
van tuan » van quan, van ban, anh tuan

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: ((hoc hien) OR (doi chieu)) sach - hanh manh cua nhung cong ((dan toan) OR (van tuan)) cau~.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (doi chieu)) sach - hanh manh cua nhung cong ((dan toan) or (van tuan)) cau*.