Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passivieren, passieren, passiverer
passiveeren » passiveeeren, passiveneeren, passivereeren, passivieren, passieren, passiverer
passivierenden » passiveierenden, passivenierenden, passiverierenden, passivierende, passivierender, aktivierenden
massiv » 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 massiv) OR (((passiveren OR passiveeren) OR passion) OR passivierenden)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or (((passiveren or passiveeren) or passion) or passivierenden))*.