Perhaps you should try some spelling variations:
"te sach cha me nguoi chan phuong trinh" » "te sach cha me nguoi chan chuong trinh", "te sach cha me nguoi chan cong trinh", "te sach cha me nguoi chan huong tran", "te sach cha me nguoi chan thuong trinh", "te sach cha me nguoi chin phuong trinh", "te sach cha me nguoi han phuong trinh", "te sach cha me nguoi cham phuong trinh", "te sach cha me nguoi chau phuong trinh", "te sach che me nguoi chan phuong trinh", "te sach ha me nguoi chan phuong trinh", "te sach cua me nguoi chan phuong trinh", "te sach cha ma nguoi chan phuong trinh", "te sach cha le nguoi chan phuong trinh", "te sach cha ke nguoi chan phuong trinh", "toc sach cha me nguoi chan phuong trinh"
"su sach nha ve gioi van thong tin" » "su sach nha ve gioi van thuong tin", "su sach nha ve gioi van phong tin", "su sach nha ve gioi va thong tin", "so sach nha ve gioi van thong tin", "vu sach nha ve gioi van thong tin", "su sach nha ve giai van thong tin", "su sach nha vien gioi van thong tin", "su sach nha van gioi van thong tin", "su sach nhat ve gioi van thong tin", "su sach nhan ve gioi van thong tin", "su sach nha va gioi van 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: (("su sach nha ve gioi van thong tin") or ("te sach cha me nguoi chan phuong trinh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach nha ve gioi van thong tin") OR ("te sach cha me nguoi chan phuong trinh")).
• Removing quotes may allow a broader search: (( su sach nha ve gioi van thong tin ) or ( te sach cha me nguoi chan phuong trinh )).
• Adding a wildcard symbol may retrieve word variants: (("su sach nha ve gioi van thong tin") or ("te sach cha me nguoi chan phuong trinh"))*.