Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivereren » passiveereren, passivenereren, passiverereren, passivieren, passivierenden, passieren, passiverwerben, passivierenen, passiveren
passivierenen » passiveierenen, passivenierenen, passiverierenen, passivierenden, passivierender, passivieren
passiverer » passiveerer, passivenerer, passivererer, passiverwerb, passivieren, passiver
passiveieren » passiveeieren, passiveneieren, passivereieren, passivieren, passionierten, passivierende
massiv » massive
massiveeren » massiveeeren, massivere, passivieren, massigeren
massigen » massiger, massigung, massie, massigern, massign
massige » massiger, massig

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 ((((passivereren OR passivierenen) OR passiverer) OR passiveieren) OR ((massigen OR massige) OR massiveeren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiv) or ((((passivereren OR passivierenen) or passiverer) or passiveieren) or ((massigen or massige) or massiveeren)))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or ((((passivereren OR passivierenen) or passiverer) or passiveieren) or ((massigen or massige) or massiveeren)))*.