Perhaps you should try some spelling variations:
"ottinger" » "pottinger", "gottingen", "luttinger"
"gottinger" » "gpottinger", "ggottingen", "gluttinger", "gottingen"
"potting" » "plotting", "blotting", "clotting"
"spotting" » "splotting", "sblotting", "sclotting", "sporting", "plotting", "blotting"

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: (("ottinger" OR "gottinger") OR ("potting" OR "spotting")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"ottinger\" OR \"gottinger\") or (\"potting\" or \"spotting\"))".
• Removing quotes may allow a broader search: (( ottinger OR gottinger ) or ( potting or spotting )).
• Adding a wildcard symbol may retrieve word variants: (("ottinger" OR "gottinger") or ("potting" or "spotting"))*.