Perhaps you should try some spelling variations:
"nijhoff boston titles" » "nijhoff boston tables", "nijhoff boston times", "nijhoff boston entitled"
"nijhoff ebook title" » "nijhoff book title", "nijhoff book titles"
"nijhoff op titles" » "nijhoff _ titles", "nijhoff j titles", "nijhoff up titles", "nijhoff comp titles", "nijhoff job titles"

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 boston titles") OR ("nijhoff op titles"))) OR ("nijhoff ebook title")).
• Removing quotes may allow a broader search: (((( nijhoff boston titles ) or ( nijhoff op titles ))) or ( nijhoff ebook title )).
• Adding a wildcard symbol may retrieve word variants: (((("nijhoff boston titles") or ("nijhoff op titles"))) or ("nijhoff ebook title"))*.