Perhaps you should try some spelling variations:
"karl mayer" » "carl mayer", "karl magers", "karl may's", "karl marxer", "karl aer", "karl mer"
"karl maria" » "carl maria", "karl martin", "karl miriam"
"karl marc" » "karl marx", "karl mays"
"karl may" » "karl marx", "karl a", "karl m"

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: (("karl mayer") OR ((("karl may") OR ((("karl marc") OR ("karl maria")))))).
• Removing quotes may allow a broader search: (( karl mayer ) or ((( karl may ) or ((( karl marc ) or ( karl maria )))))).
• Adding a wildcard symbol may retrieve word variants: (("karl mayer") or ((("karl may") or ((("karl marc") or ("karl maria"))))))*.