Perhaps you should try some spelling variations:
"nijhoff book title 20" » "nijhoff boston title 20", "nijhoff op title 20", "nijhoff book titles 20", "nijhoff book table 20", "nijhoff work title 20", "nijhoff book title 10", "nijhoff book title 21", "nijhoff book title 25", "nijhoff book title a0"
"nijhoff ebook title 20" » "nijhoff book titles 20", "nijhoff ebook titles 20", "nijhoff ebook table 20", "nijhoff ework title 20", "nijhoff ebook title 10", "nijhoff ebook title 21", "nijhoff ebook title 25", "nijhoff ebook title a0"
"nijhoff ebook title 2" » "nijhoff book titles 2", "nijhoff ebook titles 2", "nijhoff ebook table 2", "nijhoff ework title 2", "nijhoff ebook title a", "nijhoff ebook title 1"
"nijhoff ebook title _" » "nijhoff book titles _", "nijhoff ebook titles _", "nijhoff ebook table _", "nijhoff ework title _"

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 20") OR ("nijhoff book title 20"))) OR ("nijhoff ebook title 2"))) OR ("nijhoff ebook title _")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"nijhoff ebook title 20\") OR (\"nijhoff book title 20\"))) or (\"nijhoff ebook title 2\"))) or (\"nijhoff ebook title _\"))".
• Removing quotes may allow a broader search: (((((( nijhoff ebook title 20 ) OR ( nijhoff book title 20 ))) or ( nijhoff ebook title 2 ))) or ( nijhoff ebook title _ )).
• Adding a wildcard symbol may retrieve word variants: (((((("nijhoff ebook title 20") OR ("nijhoff book title 20"))) or ("nijhoff ebook title 2"))) or ("nijhoff ebook title _"))*.