Perhaps you should try some spelling variations:
de factoor » de facteur
de falcoo » de falco, die falcon, de facon
de fact » de fait, e fact, de falco
factoor » factoror, factsor
facto » factor, facts

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: (((( de falcoo ) OR ( de fact ))) OR ( ((de factoor) OR (de facto)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( de falcoo ) or ( de fact ))) or ( ((de factoor) OR (de facto)) ))".
• Adding a wildcard symbol may retrieve word variants: (((( de falcoo ) or ( de fact ))) or ( ((de factoor) OR (de facto)) ))*.