Perhaps you should try some spelling variations:
"risk gustav heinrich" » "risk auguste heinrich", "krieg gustav heinrich"
"erik gustav resch" » "erik gustav roth", "erik gustaf resch", "werk gustav resch", "devin gustav resch"
"risk gustav erich" » "risk gustavi erici", "risk gustav friedrich", "risk gustav brink", "krieg gustav erich"

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: (("erik gustav resch") OR ((("risk gustav erich") OR ("risk gustav heinrich"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"erik gustav resch\") or (((\"risk gustav erich\") OR (\"risk gustav heinrich\"))))*".
• Removing quotes may allow a broader search: (( erik gustav resch ) or ((( risk gustav erich ) OR ( risk gustav heinrich ))))*.