Perhaps you should try some spelling variations:
boston title » button title, boston entitled, boston tables
book title » book titles, ebook title, book table
title 2009 » title 2012, title 29
nijhoff op » nijhoff _, nijhoff j
title 2109 » title 10, title 21, title 19
title 20 » title 2, title 10, title 21
op title » sop title, shop title, app title

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 title 2009 ) OR ( nijhoff boston title 20 ))) OR ( nijhoff op title 2109 )).
• Adding a wildcard symbol may retrieve word variants: (((( nijhoff book title 2009 ) or ( nijhoff boston title 20 ))) or ( nijhoff op title 2109 ))*.