Perhaps you should try some spelling variations:
"nijhoff ebook title a0" » "nijhoff book title a0", "nijhoff book titles a0", "nijhoff ebook title 10", "nijhoff ebook title 20", "nijhoff ebook title 30", "nijhoff ebook title _0"
"nijhoff ebook title 1" » "nijhoff book title 1", "nijhoff book titles 1", "nijhoff ebook title _", "nijhoff ebook title 2"
"nijhoff ebook title a" » "nijhoff book title a", "nijhoff book titles a", "nijhoff ebook title _"
"nijhoff ebook title 26" » "nijhoff book title 26", "nijhoff book titles 26", "nijhoff ebook title 2", "nijhoff ebook title 21", "nijhoff ebook title 25"

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: (((("nijhoff ebook title a0") OR ((("nijhoff ebook title 1") OR ("nijhoff ebook title a"))))) OR ("nijhoff ebook title 26")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nijhoff ebook title a0\") or (((\"nijhoff ebook title 1\") OR (\"nijhoff ebook title a\"))))) or (\"nijhoff ebook title 26\"))".
• Removing quotes may allow a broader search: (((( nijhoff ebook title a0 ) or ((( nijhoff ebook title 1 ) OR ( nijhoff ebook title a ))))) or ( nijhoff ebook title 26 )).
• Adding a wildcard symbol may retrieve word variants: (((("nijhoff ebook title a0") or ((("nijhoff ebook title 1") OR ("nijhoff ebook title a"))))) or ("nijhoff ebook title 26"))*.