Perhaps you should try some spelling variations:
nhung dung » phuong dung, ung dung, thong dung
viet sach » viet anh, dien sach, viet tech
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
mai viet » thi viet
manh cua » doanh cua, ban cua
tin toan » nin toan, trinh toan, thien toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: mai viet sach - canh manh cua nhung dung ((tin toan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mai viet sach - canh manh cua nhung dung ((tin toan) OR (tinh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: mai viet sach - canh manh cua nhung dung ((tin toan) or (tinh toan)) cau*.