Perhaps you should try some spelling variations:
"su sach va le nguoi cong chuong trinh" » "su sach va le nguoi cong cong trinh", "su sach va le nguoi cong thuong trinh", "su sach va le nguoi cong chung trinh", "su sach va le nguoi cong huong trinh", "su sach va le nguoi muong chuong trinh", "su sach va le nguoi thong chuong trinh", "su sach va le nguoi nung chuong trinh", "su sach va ly nguoi cong chuong trinh", "su sach va lam nguoi cong chuong trinh", "su sach va den nguoi cong chuong trinh", "so sach va le nguoi cong chuong trinh", "vu sach va le nguoi cong chuong trinh", "su sach xa le nguoi cong chuong trinh", "su sach ha le nguoi cong chuong trinh", "su sach dao le nguoi cong chuong trinh", "su sach va de nguoi cong chuong trinh", "su sach vu le nguoi cong chuong trinh"
"te sach hua ve giai toan thong tin" » "te sach hua ve giai doan thong tin", "te sach hua ve giai toa thong tin", "te sach hua ve gioi toan thong tin", "te sach ha ve giai toan thong tin", "te sach cua ve giai toan thong tin", "te sach luan ve giai toan thong tin", "toc sach hua ve giai toan thong tin", "te sach hua va giai toan thong tin", "te sach hua ve giao toan thong tin", "te sach hua de giai toan thong tin", "te sach mua ve giai toan thong tin", "te sach chuan ve giai toan thong tin", "te sach hua ve giai toan trong tin", "te sach hua ve giai toan thong tinh"

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 va le nguoi cong chuong trinh") or ("te sach hua ve giai toan thong tin"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach va le nguoi cong chuong trinh") OR ("te sach hua ve giai toan thong tin")).
• Removing quotes may allow a broader search: (( su sach va le nguoi cong chuong trinh ) or ( te sach hua ve giai toan thong tin )).
• Adding a wildcard symbol may retrieve word variants: (("su sach va le nguoi cong chuong trinh") or ("te sach hua ve giai toan thong tin"))*.