Perhaps you should try some spelling variations:
"so sach cha me gioi co khuong tinh" » "so sach cha me gioi co chuong trinh", "so sach cha me gioi co phuong trinh", "so sach cha me gioi co phuong binh", "so sach cha me gioi co huong tinh", "so sach cha me gioi cho chuong tinh", "so sach cha me gioi cao thuong tinh", "so sach che me gioi co khuong tinh", "so sach ha me gioi co khuong tinh", "so sach cua me gioi co khuong tinh", "so sanh cha me gioi co khuong tinh", "bo sach cha me gioi co khuong tinh", "co sach cha me gioi co khuong tinh", "so sach cha me giai co khuong tinh", "so sach cha ve gioi co khuong tinh", "so sach cha me nguoi co khuong tinh"
"so sach nha vien gioi co phong minh" » "so sach nha vien gioi co thong minh", "so sach nha vien gioi co khong minh", "so sach nha vien gioi co phong tinh", "so sach nhan vien gioi co phong minh", "so sach nha viec gioi co phong minh", "so sach nhan dien gioi co phong minh", "so sach nha vien gioi cao phong minh", "so sach nha vien gioi mo phong minh", "so sach nha vien gioi o phong minh", "so sanh nha vien gioi co phong minh", "bo sach nha vien gioi co phong minh", "co sach nha vien gioi co phong minh", "so sach nha vien nguoi co phong minh"

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 me gioi co khuong tinh") or ("so sach nha vien gioi co phong minh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so sach cha me gioi co khuong tinh") OR ("so sach nha vien gioi co phong minh")).
• Removing quotes may allow a broader search: (( so sach cha me gioi co khuong tinh ) or ( so sach nha vien gioi co phong minh )).
• Adding a wildcard symbol may retrieve word variants: (("so sach cha me gioi co khuong tinh") or ("so sach nha vien gioi co phong minh"))*.