Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
passiveren » passiveeren, passiveneren, passivereren, passieren, passiverer, passiven, passiverern, passivern, massiveren
passivereren » passiveereren, passivenereren, passiverereren, passiverer, passivierenden, passieren, passivererren, passiverren, massivereren
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 (passiveren OR passivereren)) OR massiv) OR passivere).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((passiv or passivieren) or (passiveren OR passivereren)) or massiv) or passivere)".
• Adding a wildcard symbol may retrieve word variants: ((((passiv or passivieren) or (passiveren OR passivereren)) or massiv) or passivere)*.