Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passieren, passagieren
passivierung » passiveierung, massivierung, passivenierung, aktivierung
massivieren » massivere, passivierende, massivdecken
massiveren » massivere, massivement, massiven
massigeren » massiger, massigen, massivere
massiveeren » massivere, massivdecken, massivteilen

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 (((massivieren OR passivieren) OR passivierung) OR ((massiveren OR massigeren) OR massiveeren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or (((massivieren OR passivieren) or passivierung) or ((massiveren or massigeren) or massiveeren)))".
• Adding a wildcard symbol may retrieve word variants: (passiv or (((massivieren OR passivieren) or passivierung) or ((massiveren or massigeren) or massiveeren)))*.