Perhaps you should try some spelling variations:
"tu sach phan mem giao cong thong minh" » "tu sach phan mem giao cong thuong minh", "tu sach phan mem giao cong trong minh", "tu sach phan mem giao dong thong minh", "tu sach phan mem giao cong hoang minh", "tu sach han mem giao cong thong minh", "tu mach phan mem giao cong thong minh", "tu sach phat mem giao cong thong minh", "tu sach phan mem gia cong thong minh", "tu sach phan mem giao thong thong minh", "tu sach phan mem cao cong thong minh", "tu sach phan hiem giao cong thong minh", "tu sach phan nam giao cong thong minh", "tu sach phan te giao cong thong minh", "thu sach phan mem giao cong thong minh", "su sach phan mem giao cong thong minh", "te sach phan mem giao cong thong minh"
"vu bach ba me gioi co thong tin" » "vu bach ba me gioi bo thong tin", "vu bach ba me gioi co trong tin", "vu bach ba me gioi co phong tin", "vu bach ha me gioi co thong tin", "vu bach mai me gioi co thong tin", "vu sach bai me gioi co thong tin", "vu bach ba me giai co thong tin", "vu bach ba ve gioi co thong tin", "vu bach ba me nguoi co thong tin"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("vu bach ba me gioi co thong tin") or ("tu sach phan mem giao cong thong minh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("vu bach ba me gioi co thong tin") OR ("tu sach phan mem giao cong thong minh")).
• Removing quotes may allow a broader search: (( vu bach ba me gioi co thong tin ) or ( tu sach phan mem giao cong thong minh )).
• Adding a wildcard symbol may retrieve word variants: (("vu bach ba me gioi co thong tin") or ("tu sach phan mem giao cong thong minh"))*.