Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveren » passiveeren, massiveren, passivereren, passieren, passiverer, passiver
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
massively » massive
massivereren » massivpragen, massierer, massigeren, massiverren, massiveren, massivenren
massivere » massiver, massive, massiven

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