Perhaps you should try some spelling variations:
"nijhoff book entitled 2006" » "nijhoff book untitled 2001", "nijhoff boston entitled 2006"
"nijhoff book entitled 60" » "nijhoff boston entitled 60", "nijhoff book entitled _", "nijhoff book entitled a", "nijhoff book entitled mr"
"nijhoff op entitled 10" » "nijhoff m.p entitled 10", "nijhoff now entitled 10", "nijhoff _ entitled 10", "nijhoff op entitled _", "nijhoff op entitled a", "nijhoff op entitled mr", "nijhoff j entitled 10", "nijhoff op entitled _0", "nijhoff op entitled a0", "nijhoff op entitled i0"
"nijhoff op entitled 1" » "nijhoff m.p entitled 1", "nijhoff now entitled 1", "nijhoff _ entitled 1", "nijhoff j entitled 1", "nijhoff op entitled _", "nijhoff op entitled a", "nijhoff op entitled i"

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 book entitled 2006") OR ("nijhoff book entitled 60"))) OR ((("nijhoff op entitled 10") OR ("nijhoff op entitled 1")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nijhoff book entitled 2006\") or (\"nijhoff book entitled 60\"))) or (((\"nijhoff op entitled 10\") OR (\"nijhoff op entitled 1\"))))".
• Removing quotes may allow a broader search: (((( nijhoff book entitled 2006 ) or ( nijhoff book entitled 60 ))) or ((( nijhoff op entitled 10 ) OR ( nijhoff op entitled 1 )))).
• Adding a wildcard symbol may retrieve word variants: (((("nijhoff book entitled 2006") or ("nijhoff book entitled 60"))) or ((("nijhoff op entitled 10") OR ("nijhoff op entitled 1"))))*.