Perhaps you should try some spelling variations:
passiv » massiv, passiven
passivierende » massivierende, passivenierende, passivierender, passivieren, aktivierende
passive » massive, passivene
passiver » massiver, passivener, passiven, passiert
passively » massively, passivenely, passivity, passiven

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