Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiver » passiveer, massiver, passivener, passive, passiven, passively
passiverer » passiveerer, massiverer, passivenerer, passiveer, passivener, passivelyer, passiverwerb, passivieren, passieren
passiveand » passiveeand, massiveand, passiveneand, passiven
massivity » passivity, emissivity, massively
massiveene » massivement, massiven, massivere

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 ((massivity OR passiver) OR passiverer)) OR (massiveene OR passiveand)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((massivity or passiver) or passiverer)) or (massiveene or passiveand))*.