Perhaps you should try some spelling variations:
"nijhoff op title 1" » "nijhoff _ title 1", "nijhoff j title 1", "nijhoff shop title 1", "nijhoff job title 1", "nijhoff app title 1", "nijhoff op title _", "nijhoff op title 2"
"nijhoff ship title a" » "nijhoff shop title a", "nijhoff ship title _"
"nijhoff sop title a" » "nijhoff shop title a", "nijhoff job title a", "nijhoff app title a", "nijhoff sshop title a", "nijhoff sjob title a", "nijhoff sapp title a", "nijhoff sop title _"

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 op title 1") OR ((("nijhoff sop title a") OR ("nijhoff ship title a")))).
• Removing quotes may allow a broader search: (( nijhoff op title 1 ) or ((( nijhoff sop title a ) or ( nijhoff ship title a )))).
• Adding a wildcard symbol may retrieve word variants: (("nijhoff op title 1") or ((("nijhoff sop title a") or ("nijhoff ship title a"))))*.