Perhaps you should try some spelling variations:
"so sanh nganh ky thuat toan hoc" » "so anh ngan ky thuat toan hoc", "so dang nganh ky thuat toan hoc", "so sach ngan ky thuat toan hoc", "so sanh nganh y thuat toan hoc", "so sanh nganh xay thuat toan hoc", "so sanh hanh ky thuat toan hoc", "so sanh nganh ky thuat toan khoa", "so sanh nganh ky thuat van hoc", "so sanh nganh ky thuat hoa hoc", "do sanh nganh ky thuat toan hoc"
"so sach manh xay thuat o hoc" » "so sach danh xay thuat o hoc", "so sach tranh xay thuat o hoc", "so cach mang xay thuat o hoc", "so sach manh my thuat o hoc", "so sach manh va thuat o hoc", "so sach manh cac thuat o hoc", "so sach nganh xay thuat o hoc", "so sach van xay thuat o hoc", "so sach dang xay thuat o hoc", "bo sach manh xay thuat o hoc", "co sach manh xay thuat o hoc", "hoc sach manh xay thuat o hoc", "so sach manh xay thuat do hoc", "so sach manh xay thuat co hoc", "so sach manh xay thuat mo hoc", "so sach manh xay thuat so 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 sanh nganh ky thuat toan hoc") OR ("so sach manh xay thuat o hoc"))~.
• Removing quotes may allow a broader search: (( so sanh nganh ky thuat toan hoc ) or ( so sach manh xay thuat o hoc ))~.
• Adding a wildcard symbol may retrieve word variants: (("so sanh nganh ky thuat toan hoc") or ("so sach manh xay thuat o hoc"))*.