Perhaps you should try some spelling variations:
"nijhoff ebook title 25" » "nijhoff book title 25", "nijhoff book titles 25", "nijhoff ebook title 5", "nijhoff ebook title 26", "nijhoff ebook title _", "nijhoff ebook title _5", "nijhoff ebook title a5", "nijhoff ebook title 15"
"nijhoff ebook title 15" » "nijhoff book title 15", "nijhoff book titles 15", "nijhoff ebook title 1", "nijhoff ebook title 10", "nijhoff ebook title 17"
"nijhoff ebook title 21" » "nijhoff book title 21", "nijhoff book titles 21", "nijhoff ebook title 1", "nijhoff ebook title _", "nijhoff ebook title a", "nijhoff ebook title _1", "nijhoff ebook title a1", "nijhoff ebook title 11"
"nijhoff ebook title 2" » "nijhoff book title 2", "nijhoff book titles 2", "nijhoff ebook title _", "nijhoff ebook title a", "nijhoff ebook title 1"

Try widening your search to All Fields.

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 25") OR ("nijhoff ebook title 15"))) OR ("nijhoff ebook title 21"))) OR ("nijhoff ebook title 2")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"nijhoff ebook title 25\") OR (\"nijhoff ebook title 15\"))) or (\"nijhoff ebook title 21\"))) or (\"nijhoff ebook title 2\"))".
• Removing quotes may allow a broader search: (((((( nijhoff ebook title 25 ) OR ( nijhoff ebook title 15 ))) or ( nijhoff ebook title 21 ))) or ( nijhoff ebook title 2 )).
• Adding a wildcard symbol may retrieve word variants: (((((("nijhoff ebook title 25") OR ("nijhoff ebook title 15"))) or ("nijhoff ebook title 21"))) or ("nijhoff ebook title 2"))*.