Perhaps you should try some spelling variations:
passiv » massiv, passiven
passiver » massiver, passivener, passiven, passively, passiert
passive » massive, passivene
passivenere » massivenere, passivenenere, passiverwerb
passiverer » massiverer, passivenerer, passivener, passivelyer, passierter, passiverwerb, passivieren, passieren
massiveren » massivere, massigeren, massivement

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: (((passiv OR passiver) OR (passive OR (passivenere OR passiverer))) OR (massive OR massiveren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv OR passiver) or (passive or (passivenere or passiverer))) or (massive or massiveren))".
• Adding a wildcard symbol may retrieve word variants: (((passiv OR passiver) or (passive or (passivenere or passiverer))) or (massive or massiveren))*.