Perhaps you should try some spelling variations:
"de factor" » "e factor", "dose factor", "mode factor", "de faconor", "one factor", "de factsr"
"de fact" » "e fact", "de facon", "one fact"
"de facto" » "e facto", "de facono", "one facto", "de facts"
"de fait" » "de faits", "le fait", "se fait"

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 fact") OR ("de falco"))) OR ("de fait"))) OR ((("de factor") OR ((("de facto") OR ("de factor")))))).
• Removing quotes may allow a broader search: (((((( de fact ) or ( de falco ))) or ( de fait ))) or ((( de factor ) or ((( de facto ) or ( de factor )))))).
• Adding a wildcard symbol may retrieve word variants: (((((("de fact") or ("de falco"))) or ("de fait"))) or ((("de factor") or ((("de facto") or ("de factor"))))))*.