Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passivieren » passiveieren, massivieren, passiverieren, passivierende, passieren, passagieren
passivierung » passiveierung, massivierung, passiverierung, aktivierung
passiven » passiveen, massiven, passiveren, passive
massiver » massive, massiven, passiver

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