Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passieren, passagieren
passivierung » passiveierung, passivenierung, passiverierung, aktivierung
massiv » massive
massivieren » massiveieren, massivere, passivierende, massivdecken
massiveeren » massiveeeren, massivere, massivdecken, massivteilen
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 (((passivieren OR massivieren) OR passivierung) OR (massigeren OR massiveeren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv OR massiv) or (((passivieren or massivieren) or passivierung) or (massigeren or massiveeren)))".
• Adding a wildcard symbol may retrieve word variants: ((passiv OR massiv) or (((passivieren or massivieren) or passivierung) or (massigeren or massiveeren)))*.