Perhaps you should try some spelling variations:
"nijhoff boston title _" » "nijhoff boston entitled _", "nijhoff boston tables _", "nijhoff boston twelve _"
"nijhoff book table 2009" » "nijhoff op table 2009", "nijhoff book table 20", "nijhoff book table 2.9", "nijhoff book table 29"
"nijhoff book title 20" » "nijhoff op title 20", "nijhoff book titles 20", "nijhoff ebook title 20", "nijhoff work title 20", "nijhoff book title 2", "nijhoff book title 25", "nijhoff book title 26"
"nijhoff book title 21" » "nijhoff op title 21", "nijhoff book titles 21", "nijhoff ebook title 21", "nijhoff work title 21", "nijhoff book title 1", "nijhoff book title 2", "nijhoff book title a"
"nijhoff book title 10" » "nijhoff op title 10", "nijhoff book titles 10", "nijhoff ebook title 10", "nijhoff work title 10", "nijhoff book title 1", "nijhoff book title a", "nijhoff book title 2"
"nijhoff sop title 2109" » "nijhoff op title 2109", "nijhoff sop title 19", "nijhoff sop title 29", "nijhoff shop title 2109", "nijhoff ship title 2109", "nijhoff sop title 109", "nijhoff sop title 209", "nijhoff sop title a09"
"nijhoff app title 2109" » "nijhoff op title 2109", "nijhoff app title 19", "nijhoff app title 29", "nijhoff a title 2109", "nijhoff app title 109", "nijhoff app title 209", "nijhoff app title a09"
"nijhoff app title 109" » "nijhoff op title 109", "nijhoff a title 109", "nijhoff app title 19", "nijhoff app title 1", "nijhoff app title 17", "nijhoff app title a9", "nijhoff app title 29"

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 book table 2009") OR ((((("nijhoff book title 20") OR ("nijhoff book title 21"))) OR ((("nijhoff book title 10") OR ("nijhoff boston title _"))))))) OR ((("nijhoff sop title 2109") OR ((("nijhoff app title 2109") OR ("nijhoff app title 109")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nijhoff book table 2009\") or (((((\"nijhoff book title 20\") or (\"nijhoff book title 21\"))) or (((\"nijhoff book title 10\") or (\"nijhoff boston title _\"))))))) or (((\"nijhoff sop title 2109\") or (((\"nijhoff app title 2109\") OR (\"nijhoff app title 109\"))))))".
• Removing quotes may allow a broader search: (((( nijhoff book table 2009 ) or ((((( nijhoff book title 20 ) or ( nijhoff book title 21 ))) or ((( nijhoff book title 10 ) or ( nijhoff boston title _ ))))))) or ((( nijhoff sop title 2109 ) or ((( nijhoff app title 2109 ) OR ( nijhoff app title 109 )))))).
• Adding a wildcard symbol may retrieve word variants: (((("nijhoff book table 2009") or ((((("nijhoff book title 20") or ("nijhoff book title 21"))) or ((("nijhoff book title 10") or ("nijhoff boston title _"))))))) or ((("nijhoff sop title 2109") or ((("nijhoff app title 2109") OR ("nijhoff app title 109"))))))*.