Perhaps you should try some spelling variations:
"nijhoff book titless" » "nijhoff boston titless", "nijhoff book title", "nijhoff ebook title", "nijhoff book tables", "nijhoff book entitleds", "nijhoff book intitleds"
"nijhoff book titles" » "nijhoff boston titles", "nijhoff book entitled", "nijhoff book intitled"
"nijhoff comp titles" » "nijhoff column titles", "nijhoff forms titles"
"nijhoff op titles" » "nijhoff _ titles", "nijhoff j titles", "nijhoff up titles", "nijhoff job titles"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("nijhoff book titless") OR ((("nijhoff book titles") OR ((("nijhoff op titles") OR ("nijhoff comp titles")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nijhoff book titless\") or (((\"nijhoff book titles\") or (((\"nijhoff op titles\") OR (\"nijhoff comp titles\"))))))".
• Removing quotes may allow a broader search: (( nijhoff book titless ) or ((( nijhoff book titles ) or ((( nijhoff op titles ) OR ( nijhoff comp titles )))))).
• Adding a wildcard symbol may retrieve word variants: (("nijhoff book titless") or ((("nijhoff book titles") or ((("nijhoff op titles") OR ("nijhoff comp titles"))))))*.