Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivere » passiveere, massivere, passivenere, passiverer, passiver, passivieren
passivener » passiveener, massivener, passivenener, passiverer, passiven, passiver
massivere » massiver, massive, massiven
massively » massive

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 ((passivere OR massivere) OR ((massively OR passivener) OR massively))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivere or massivere) or ((massively or passivener) or massively)))*.