Perhaps you should try some spelling variations:
passiver » passive, passiven, passively
massiv » massive
massiven » massiveen, massive, passiven, massively
massiveen » massiveeen, massivement, massivsten, massigeren
massiger » massinger, massive, massie

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