Perhaps you should try some spelling variations:
passiver » passiven, passiert
massivee » massivere, massive, massiver
passively » passivity, passiven
massiven » massive, passiven, massiv
massively » massive
massiveren » massivere, massigeren, massivement

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: (((passiver OR passive) OR (massivee OR passively)) OR ((massiven OR massively) OR massiveren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiver or passive) or (massivee or passively)) or ((massiven OR massively) or massiveren))".
• Adding a wildcard symbol may retrieve word variants: (((passiver or passive) or (massivee or passively)) or ((massiven OR massively) or massiveren))*.