Perhaps you should try some spelling variations:
"vu sach bai de giai phap phan minh" » "vu sach bai de giai phap phat minh", "vu sach bai de giai phap hoan minh", "vu sach bai de giai phap luan minh", "vu sach bai de giai phap pham minh", "vu sach bai de giai phap phan dinh", "vu sach bai de giai phap phan kinh", "vu sach dao de giai phap phan minh", "vu cac bai de giai phap phan minh", "vu sach xa de giai phap phan minh", "vu bach bai de giai phap phan minh", "su sach bai de giai phap phan minh", "vu khach bai de giai phap phan minh", "vu sach bai dan giai phap phan minh", "vu sach bai kem giai phap phan minh", "vu sach dai de giai phap phan minh", "vu sach lai de giai phap phan minh", "vu sach bai da giai phap phan minh"
"so sanh xa le gioi co tong minh" » "so sanh xa le gioi co thong minh", "so sanh xa le gioi co trong minh", "so sanh xa le gioi co song minh", "do sanh xa le gioi co tong minh", "so sach xa le gioi co tong minh", "so canh xa le gioi co tong minh", "so sanh ca le gioi co tong minh", "so sanh xa le giai co tong minh", "so sanh xa ve gioi co tong minh", "so sanh xa loi gioi co tong minh", "so sanh xa le nguoi co tong minh", "so sanh xa le gioi co dong minh", "so sanh xa le gioi co ton minh", "so sanh va le gioi co tong minh", "so sanh ha le gioi co tong minh", "so sanh xa la gioi co tong minh"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("vu sach bai de giai phap phan minh") or ("so sanh xa le gioi co tong minh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("vu sach bai de giai phap phan minh") OR ("so sanh xa le gioi co tong minh")).
• Removing quotes may allow a broader search: (( vu sach bai de giai phap phan minh ) or ( so sanh xa le gioi co tong minh )).
• Adding a wildcard symbol may retrieve word variants: (("vu sach bai de giai phap phan minh") or ("so sanh xa le gioi co tong minh"))*.