Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivieren » passiveieren, passivenieren, passiverieren, passivierung, passieren, passagieren
passivierende » passiveierende, passivenierende, passiverierende, passivierungde, passierende, passagierende, passivierender, aktivierende, passivierung
passiveren » passiveeren, passiveneren, passivereren, passieren, passiverer, passiven, passiverern, passivern, massiveren
passivere » passiveere, passivenere, passiverere, passiverer, passiver, massivere
massiv » massive

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