Perhaps you should try some spelling variations:
"tu cach cua de giai cong chuong trinh" » "tu cach cua de giai cong cong trinh", "tu cach cua de giai cong thuong trinh", "tu cach cua de giai cong chung trinh", "tu cach cua de giai cong huong trinh", "tu cach cua de gia cong chuong trinh", "tu cach cua de giao cong chuong trinh", "tu cach cua de giai phong chuong trinh", "tu mach cua de giai cong chuong trinh", "tu cac cua de giai cong chuong trinh", "tu cach dua de giai cong chuong trinh", "tu cach cua dan giai cong chuong trinh", "tu cach cua kem giai cong chuong trinh", "tu cach cua te giai cong chuong trinh", "tu cach cua du giai cong chuong trinh", "tu cach cua he giai cong chuong trinh"
"te sach xa le gioi van thong tin" » "te sach xa le gioi van thuong tin", "te sach xa le gioi van phong tin", "te sach xa le gioi va thong tin", "toc sach xa le gioi van thong tin", "te sach dao le gioi van thong tin", "te sach nha le gioi van thong tin", "te sach bai le gioi van thong tin", "te sach xa le giai van thong tin", "te sach xa ve gioi van thong tin", "te sach xa loi gioi van thong tin", "te sach va le gioi van thong tin", "te sach ha le gioi van thong tin", "te sach xa la gioi van thong tin", "te sach xa le gioi van thong tinh"

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: (("tu cach cua de giai cong chuong trinh") or ("te sach xa le gioi van thong tin"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("tu cach cua de giai cong chuong trinh") OR ("te sach xa le gioi van thong tin")).
• Removing quotes may allow a broader search: (( tu cach cua de giai cong chuong trinh ) or ( te sach xa le gioi van thong tin )).
• Adding a wildcard symbol may retrieve word variants: (("tu cach cua de giai cong chuong trinh") or ("te sach xa le gioi van thong tin"))*.