Perhaps you should try some spelling variations:
"nijhoff book title 26" » "nijhoff boston title 26", "nijhoff op title 26", "nijhoff book titles 26", "nijhoff work title 26", "nijhoff book time 26", "nijhoff book title 2", "nijhoff book title 21", "nijhoff book title 25"
"nijhoff book table 26" » "nijhoff boston table 26", "nijhoff op table 26", "nijhoff book table 2.6", "nijhoff book tables 26", "nijhoff book table 2"
"nijhoff ebook title 20" » "nijhoff book titles 20", "nijhoff ebook titles 20", "nijhoff ework title 20", "nijhoff ebook time 20", "nijhoff ebook title 2", "nijhoff ebook title 10", "nijhoff ebook title 21"
"nijhoff ebook title 26" » "nijhoff book titles 26", "nijhoff ebook titles 26", "nijhoff ework title 26", "nijhoff ebook time 26", "nijhoff ebook title 2", "nijhoff ebook title 21", "nijhoff ebook title 25"

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 ebook title 26") OR ((("nijhoff book title 26") OR ("nijhoff book table 26")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nijhoff ebook title 20\") or (((\"nijhoff ebook title 26\") or (((\"nijhoff book title 26\") OR (\"nijhoff book table 26\"))))))".
• Removing quotes may allow a broader search: (( nijhoff ebook title 20 ) or ((( nijhoff ebook title 26 ) or ((( nijhoff book title 26 ) OR ( nijhoff book table 26 )))))).
• Adding a wildcard symbol may retrieve word variants: (("nijhoff ebook title 20") or ((("nijhoff ebook title 26") or ((("nijhoff book title 26") OR ("nijhoff book table 26"))))))*.