Perhaps you should try some spelling variations:
"nijhoff book title" » "nijhoff boston title", "nijhoff op title", "nijhoff book titles", "nijhoff book table", "nijhoff work title"
"nijhoff ebook titles" » "nijhoff book titles", "nijhoff about titles", "nijhoff work titles", "nijhoff book titless", "nijhoff ebook titless", "nijhoff ebook tables", "nijhoff ework titles"
"nijhoff ebook title" » "nijhoff book titles", "nijhoff ebook titles", "nijhoff ebook table", "nijhoff ework 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") OR ((("nijhoff ebook title") OR ("nijhoff ebook titles"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nijhoff book title\") or (((\"nijhoff ebook title\") OR (\"nijhoff ebook titles\"))))*".
• Removing quotes may allow a broader search: (( nijhoff book title ) or ((( nijhoff ebook title ) OR ( nijhoff ebook titles ))))*.