Perhaps you should try some spelling variations:
"su sach cha te giao cong thong tin" » "su sach cha te giao cong thuong tin", "su sach cha te giao cong trong tin", "su sach cha te giao dong thong tin", "su sach cha te gia cong thong tin", "su sach cha te giao thong thong tin", "su sach cha te cao cong thong tin", "su sach nha te giao cong thong tin", "su sach che te giao cong thong tin", "su sach ha te giao cong thong tin", "so sach cha te giao cong thong tin", "vu sach cha te giao cong thong tin", "su sach cha ton giao cong thong tin", "su sach cha me giao cong thong tin", "su sach cua te giao cong thong tin"
"tu sach nhan vien gioi thong thong tin" » "tu sach nhan vien gioi trong thong tin", "tu sach nhan vien nguoi thong thong tin", "tu sach nhan vien giao thong thong tin", "tu sach nha vien gioi thong thong tin", "tu sach han vien gioi thong thong tin", "tu sach ngan vien gioi thong thong tin", "thu sach nhan vien gioi thong thong tin", "te sach nhan vien gioi thong thong tin", "tu cach nhan vien gioi thong thong tin", "tu sach nhan viet gioi thong thong tin", "tu sach nhan bien gioi thong 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: (("tu sach nhan vien gioi thong thong tin") or ("su sach cha te giao cong thong tin"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("tu sach nhan vien gioi thong thong tin") OR ("su sach cha te giao cong thong tin")).
• Removing quotes may allow a broader search: (( tu sach nhan vien gioi thong thong tin ) or ( su sach cha te giao cong thong tin )).
• Adding a wildcard symbol may retrieve word variants: (("tu sach nhan vien gioi thong thong tin") or ("su sach cha te giao cong thong tin"))*.