Perhaps you should try some spelling variations:
michael feldhaus » michael feathers, michael felczak, michael felder
michael kelly » michael della, michael heller, michael kirby
kelly author » kelly anthony, henry author, only author

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: (( michael kelly author ) OR ( michael feldhaus author )).
• Adding a wildcard symbol may retrieve word variants: (( michael kelly author ) or ( michael feldhaus author ))*.