Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passieren, passiverer, passiven
passiveneren » passiveeneren, passiveneneren, passivereneren, passieren, passiverer
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
passiveieren » passiveeieren, passiveneieren, passivereieren, passionierten, passivierende, passieren
massiv » massive
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 ((passiveren OR passiveneren) OR (massigeren OR (passivieren OR passiveieren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiv) or ((passiveren or passiveneren) or (massigeren or (passivieren OR passiveieren))))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or ((passiveren or passiveneren) or (massigeren or (passivieren OR passiveieren))))*.