Perhaps you should try some spelling variations:
"michael warren schwarz" » "michael warten schwarz" (Expand Search), "michael wahren schwarz" (Expand Search), "michael wirren schwarz" (Expand Search), "michael warren schwarzen" (Expand Search), "michael warren schwarzes" (Expand Search)
"michael waren schwarz" » "michael waren schwarzen" (Expand Search), "michael waren schwarzes" (Expand Search)
"michael karren schwarz" » "michael karren schwarzen" (Expand Search), "michael karren schwarzes" (Expand Search), "michael karten schwarz" (Expand Search)

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: "((((\"michael warren schwarz\") OR (\"michael waren schwarz\"))) OR (\"michael karren schwarz\"))~".
• Removing quotes may allow a broader search: (((( michael warren schwarz ) OR ( michael waren schwarz ))) OR ( michael karren schwarz ))~.
• Adding a wildcard symbol may retrieve word variants: (((("michael warren schwarz") OR ("michael waren schwarz"))) OR ("michael karren schwarz"))*.