Perhaps you should try some spelling variations:
passiv » passiven, passiver
passive » passivene, passivere
massiv » massive
massiveeren » massiveeeren, massivere, passivieren, massigeren
passieren » passiert, passiven
massiger » massinger, massive, massig
massie » massive, massif, 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 passive) OR massiv) OR (passieren OR ((massiger OR massie) OR massiveeren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or passive) or massiv) or (passieren or ((massiger OR massie) or massiveeren)))".
• Adding a wildcard symbol may retrieve word variants: (((passiv or passive) or massiv) or (passieren or ((massiger OR massie) or massiveeren)))*.