Perhaps you should try some spelling variations:
de factor » e factor, dose factor, mode factor
de faits » des faits, les faits, de traits
de fact » e fact, de falco, de facon
de fait » le fait, se fait, du fait
facto » facts
factor » factsr

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