Perhaps you should try some spelling variations:
"nijhoff cotton charles 2006" » "nijhoff boston charles 2006", "nijhoff hutton charles 2006", "nijhoff cotton charles 20", "nijhoff cotton charter 2006", "nijhoff cotton charles 1656"
"nijhoff barton charles 2006" » "nijhoff boston charles 2006", "nijhoff martinus charles 2006", "nijhoff wharton charles 2006", "nijhoff brereton charles 2006", "nijhoff hutton charles 2006", "nijhoff barton charles 20", "nijhoff barton charter 2006", "nijhoff barton charles 1656"

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 cotton charles 2006") OR ("nijhoff barton charles 2006")).
• Removing quotes may allow a broader search: (( nijhoff cotton charles 2006 ) or ( nijhoff barton charles 2006 )).
• Adding a wildcard symbol may retrieve word variants: (("nijhoff cotton charles 2006") or ("nijhoff barton charles 2006"))*.