Perhaps you should try some spelling variations:
"michael henry author" » "michel henry author", "michael henein author", "michel henry's author", "michael theory author", "michael hervey author", "michael any author"
"michael henry arthur" » "michel henry arthur", "michael henein arthur", "michel henry's arthur"
"michael della author" » "michael kelly author", "michael heller author", "michael de author", "michael cells author", "michael wells 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 henry arthur"))) OR ("michael della author")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"michael henry author\") OR (\"michael henry arthur\"))) or (\"michael della author\"))".
• Removing quotes may allow a broader search: (((( michael henry author ) OR ( michael henry arthur ))) or ( michael della author )).
• Adding a wildcard symbol may retrieve word variants: (((("michael henry author") OR ("michael henry arthur"))) or ("michael della author"))*.