Perhaps you should try some spelling variations:
"michael heller author" » "michael goller author", "michael muller author", "michael hall author", "michael feller author", "michael helme author", "michael hepner author"
"michael miller author" » "michael muller author", "michael millek author", "michael mueller author", "michael maillet author", "michael feller author", "michael schiller author"
"michael henry author" » "michel henry author", "michael henein author", "michel henry's author", "michael theory author", "michael henry arthur", "michael hervey 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 henry author") OR ((("michael heller author") OR ("michael miller author")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"michael henry author\") or (((\"michael heller author\") OR (\"michael miller author\"))))".
• Removing quotes may allow a broader search: (( michael henry author ) or ((( michael heller author ) OR ( michael miller author )))).
• Adding a wildcard symbol may retrieve word variants: (("michael henry author") or ((("michael heller author") OR ("michael miller author"))))*.