Perhaps you should try some spelling variations:
"so sach ngan y thuat toan hoc" » "so sach ngon y thuat toan hoc", "so sach nha y thuat toan hoc", "so sach han y thuat toan hoc", "so sach ngan y thuat toan khoa", "so sach ngan y thuat van hoc", "so sach ngan y thuat hoa hoc", "so sanh ngan y thuat toan hoc", "bo sach ngan y thuat toan hoc", "co sach ngan y thuat toan hoc", "so sach ngan ky thuat toan hoc", "so sach ngan my thuat toan hoc", "so sach ngan kxy thuat toan hoc", "so sach nganh y thuat toan hoc", "so sach nhan y thuat toan hoc", "so sach nganh ky thuat toan hoc"
"so sach manh va thuat toan hoc" » "so sach danh va thuat toan hoc", "so sach tranh va thuat toan hoc", "so cach mang va thuat toan hoc", "so sach manh va thuat toan khoa", "so sach manh va thuat van hoc", "so sach manh va thuat hoa hoc", "so sach manh ky thuat toan hoc", "so sach manh ki thuat toan hoc", "so sach manh va thuc toan hoc", "so sanh manh va thuat toan hoc", "bo sach manh va thuat toan hoc", "co sach manh va thuat toan hoc", "so sach hanh va thuat toan hoc", "so sach anh va thuat toan hoc", "so sach minh va thuat toan hoc"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("so sach ngan y thuat toan hoc") OR ("so sach manh va thuat toan hoc"))~.
• Removing quotes may allow a broader search: (( so sach ngan y thuat toan hoc ) or ( so sach manh va thuat toan hoc ))~.
• Adding a wildcard symbol may retrieve word variants: (("so sach ngan y thuat toan hoc") or ("so sach manh va thuat toan hoc"))*.