Perhaps you should try some spelling variations:
"so sach cha ve gioi cong thong minh" » "so sach cha ve gioi cong thong tin", "so sach cha ve gioi cong hoang minh", "so sach cha ve gioi cong thuong minh", "so sach cha ve gioi cong trong minh", "so sach cha ve gioi dong thong minh", "so sach cha ve gioi song thong minh", "so sach cha ve nguoi cong thong minh", "so sach nha ve gioi cong thong minh", "so sach che ve gioi cong thong minh", "so sach ha ve gioi cong thong minh", "so sanh cha ve gioi cong thong minh", "bo sach cha ve gioi cong thong minh", "co sach cha ve gioi cong thong minh", "so sach cha ve giai cong thong minh", "so sach cha vien gioi cong thong minh", "so sach cha van gioi cong thong minh", "so sach cha me gioi cong thong minh", "so sach ca ve gioi cong thong minh", "so sach pha ve gioi cong thong minh"
"su sach tham me gioi co trong tin" » "su sach nha me gioi co trong tin", "su sach tham me gioi co thong tin", "su sach tham me gioi co trong tan", "su sach tham me gioi co trong tieng", "su sach tham me gioi ro trong tin", "su sach tham me gioi cong trong tin", "su sach tham me gioi cay trong tin", "vu sach tham me gioi co trong tin", "su sach tham my gioi co trong tin", "su sach pham men gioi co trong tin", "su sach tham me giai co trong tin", "su sach tham me nguoi co trong tin", "su sach tham moi gioi co trong 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: (("so sach cha ve gioi cong thong minh") or ("su sach tham me gioi co trong tin"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so sach cha ve gioi cong thong minh") OR ("su sach tham me gioi co trong tin")).
• Removing quotes may allow a broader search: (( so sach cha ve gioi cong thong minh ) or ( su sach tham me gioi co trong tin )).
• Adding a wildcard symbol may retrieve word variants: (("so sach cha ve gioi cong thong minh") or ("su sach tham me gioi co trong tin"))*.