Perhaps you should try some spelling variations:
"so sach nganh ky thuat toan hoc" » "so sach ngan ky thuat toan hoc", "so sach tranh ky thuat toan hoc", "so cac nganh ky thuat toan hoc", "so sach nganh y thuat toan hoc", "so sach hanh ky thuat toan hoc", "so sach nganh co thuat toan hoc", "so sach nganh ky thuat toan khoa", "so sach nganh ky thuat van hoc", "so sach nganh ky thuat hoa hoc", "so sanh nganh ky thuat toan hoc", "bo sach nganh ky thuat toan hoc", "co sach nganh ky thuat toan hoc"
"so sach nganh xay thuat toan hoc" » "so sach ngan xay thuat toan hoc", "so sach tranh xay thuat toan hoc", "so cac nganh xay thuat toan hoc", "so sach nganh mac thuat toan hoc", "so sach nganh y thuat toan hoc", "so sach nganh ma thuat toan hoc", "so sach nganh my thuat toan hoc", "so sach nganh va thuat toan hoc", "so sach nganh cac thuat toan hoc", "so sach nganh xay thuat toan khoa", "so sach nganh xay thuat van hoc", "so sach nganh xay thuat hoa hoc", "so sanh nganh xay thuat toan hoc", "bo sach nganh xay thuat toan hoc", "co sach nganh xay thuat toan hoc"

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 nganh ky thuat toan hoc") OR ("so sach nganh xay thuat toan hoc"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"so sach nganh ky thuat toan hoc\") OR (\"so sach nganh xay thuat toan hoc\"))".
• Removing quotes may allow a broader search: (( so sach nganh ky thuat toan hoc ) OR ( so sach nganh xay thuat toan hoc )).
• Adding a wildcard symbol may retrieve word variants: (("so sach nganh ky thuat toan hoc") OR ("so sach nganh xay thuat toan hoc"))*.