Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivierende » passiveierende, passivenierende, passiverierende, passivierender, passivieren, aktivierende
massiv » massive
massiveeren » massiveeeren, massivere, passivieren, massivdecken
massigeren » massiger, massigen, 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 massiv) OR (passivierende OR (massigeren OR massiveeren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv OR massiv) or (passivierende or (massigeren or massiveeren)))".
• Adding a wildcard symbol may retrieve word variants: ((passiv OR massiv) or (passivierende or (massigeren or massiveeren)))*.