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

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