Perhaps you should try some spelling variations:
"su sach cha va nguoi con cong trinh" » "su sach cha va nguoi cong cong trinh", "su sach cha va nguoi co cong trinh", "su sach cha va nguoi cor cong trinh", "su sach nha va nguoi con cong trinh", "su sach che va nguoi con cong trinh", "su sach ha va nguoi con cong trinh", "su sach cha ca nguoi con cong trinh", "su sach cha cua nguoi con cong trinh", "su sach cha dao nguoi con cong trinh", "su sach cha va nguoi con cuong trinh", "su sach cha va nguoi bon cong trinh", "so sach cha va nguoi con cong trinh", "vu sach cha va nguoi con cong trinh", "su sach chat va nguoi con cong trinh", "su sach chai va nguoi con cong trinh", "su sach cham va nguoi con cong trinh"
"su sach cap ke nguoi hoi thong tin" » "su sach cap ke nguoi khoi thong tin", "su sach cap ke nguoi moi thong tin", "su sach cap ke nguoi noi thong tin", "su sach cap ke nguoi hoi thuong tin", "su sach cap ke nguoi hoi trong tin", "su sach cap ke nguoi hoa thong tin", "su sach dao ke nguoi hoi thong tin", "su sach bai ke nguoi hoi thong tin", "su sach xa ke nguoi hoi thong tin", "su sach cap le nguoi hoi thong tin", "su sach cap ky nguoi hoi thong tin", "su sach cap me nguoi hoi thong tin", "so sach cap ke nguoi hoi thong tin", "vu sach cap ke nguoi hoi thong tin", "su sach lap ke nguoi hoi thong tin", "su sach ca ke nguoi hoi thong tin", "su sach cac ke nguoi hoi thong tin", "su sach cap ke nguoi hoi 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: (("su sach cha va nguoi con cong trinh") or ("su sach cap ke nguoi hoi thong tin"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach cha va nguoi con cong trinh") OR ("su sach cap ke nguoi hoi thong tin")).
• Removing quotes may allow a broader search: (( su sach cha va nguoi con cong trinh ) or ( su sach cap ke nguoi hoi thong tin )).
• Adding a wildcard symbol may retrieve word variants: (("su sach cha va nguoi con cong trinh") or ("su sach cap ke nguoi hoi thong tin"))*.