Perhaps you should try some spelling variations:
"nijhoff book titles" » "nijhoff boston titles", "nijhoff op titles", "nijhoff book entitled", "nijhoff book intitled", "nijhoff book tables", "nijhoff work titles", "nijhoff book times"
"nijhoff book title" » "nijhoff boston title", "nijhoff op title", "nijhoff book table", "nijhoff work title", "nijhoff book time"
"nijhoff ebook titles" » "nijhoff about titles", "nijhoff ebook entitled", "nijhoff ebook intitled", "nijhoff ebook tables", "nijhoff ework titles", "nijhoff ebook times"
"nijhoff work titles" » "nijhoff op titles", "nijhoff works titles", "nijhoff work title", "nijhoff works title"
"nijhoff ebook title" » "nijhoff ebook table", "nijhoff ework title", "nijhoff ebook time"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("nijhoff book titles") OR ("nijhoff book title"))) OR ((("nijhoff ebook title") OR ("nijhoff ebook titles"))))) OR ("nijhoff work titles")).
• Removing quotes may allow a broader search: (((((( nijhoff book titles ) or ( nijhoff book title ))) or ((( nijhoff ebook title ) or ( nijhoff ebook titles ))))) or ( nijhoff work titles )).
• Adding a wildcard symbol may retrieve word variants: (((((("nijhoff book titles") or ("nijhoff book title"))) or ((("nijhoff ebook title") or ("nijhoff ebook titles"))))) or ("nijhoff work titles"))*.