Perhaps you should try some spelling variations:
"so sach ba me giai can thong minh" » "so sach ba me giai can hoang minh", "so sach ba me giai ban thong minh", "so sach ba me giai van thong minh", "so sach ba me giai chan thuong minh", "so sach ba me giai han thong minh", "so sach ba me giai san thong minh", "so sach ba me giai ca thong minh", "so sanh ba me giai can thong minh", "bo sach ba me giai can thong minh", "co sach ba me giai can thong minh", "so sach bai me giai can thong minh", "so sach bac me giai can thong minh", "so sach bao me giai can thong minh", "so sach ba de giai can thong minh", "so sach ba ve giai can thong minh", "so sach ba ke giai can thong minh"
"tu cach pha co giai va thong tin" » "tu cach pha co giai va thuong tin", "tu cach pha co giai va phuong tin", "tu cach pha co giai he thong tin", "tu cac pha co giai va thong tin", "tu cach pha cao giai va thong tin", "tu cach pha so giai va thong tin", "tu cach pha ro giai va thong tin", "tu cach pha co giai van thong tin", "tu cach pha co gia va thong tin", "tu cach pha co giai ma thong tin", "tu cach phan co giai va thong tin", "tu cach phai co giai va thong tin", "tu cach pa co giai va thong tin", "tu cach pha co giai va 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: (("so sach ba me giai can thong minh") or ("tu cach pha co giai va thong tin"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so sach ba me giai can thong minh") OR ("tu cach pha co giai va thong tin")).
• Removing quotes may allow a broader search: (( so sach ba me giai can thong minh ) or ( tu cach pha co giai va thong tin )).
• Adding a wildcard symbol may retrieve word variants: (("so sach ba me giai can thong minh") or ("tu cach pha co giai va thong tin"))*.