Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passivierender » massivierender, passivenierender, passiverierender, passivierende, aktivierender, passivieren
passive » massive, passivene, passivere
massiven » passiven, massively, massiv

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 massiven) OR passivierender) OR (passive OR massive)).
• Adding a wildcard symbol may retrieve word variants: (((passiv or massiven) or passivierender) or (passive or massive))*.