Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
massiv » massive
massiven » massiveen, massive, passiven, massively
massiveen » massiveeen, massivement, massivsten, massigeren
massigen » massiger, massige, massigung

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