Perhaps you should try some spelling variations:
"charles cornell scale" » "charles morell scale", "charles cornelius scale", "charles snell scale", "charles cornell small", "charles cell scale", "charles cornell saul"
"charles cordell scale" » "charles morell scale", "charles lopdell scale", "charles caldwell scale", "charles model scale", "charles cell scale", "charles correct scale"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"charles cornell scale\") OR (\"charles cordell scale\"))".
• Removing quotes may allow a broader search: (( charles cornell scale ) OR ( charles cordell scale )).
• Adding a wildcard symbol may retrieve word variants: (("charles cornell scale") OR ("charles cordell scale"))*.