Perhaps you should try some spelling variations:
"samuel harris cohen" » "samuel charles cohen", "samuel hartlib cohen", "samuel hayes cohen", "samuel morris cohen", "samuel harris when", "samuel harris corner"
"daniel garret cohen" » "daniel garber cohen", "daniel gabriel cohen", "daniel torres cohen", "daniel laurent cohen", "daniel garrett john", "daniel sarit cohen"

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: (("samuel harris cohen") OR ("daniel garret cohen")).
• Removing quotes may allow a broader search: (( samuel harris cohen ) or ( daniel garret cohen )).
• Adding a wildcard symbol may retrieve word variants: (("samuel harris cohen") or ("daniel garret cohen"))*.