Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivierende » passiveierende, massivierende, passivenierende, passivierender, passivieren, aktivierende
passivierung » passiveierung, massivierung, passivenierung, aktivierung
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 (massively OR passivierende)) OR passivierung).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (massively or passivierende)) or passivierung)*.