Perhaps you should try some spelling variations:
"de factor" » "de facto", "dose factor", "mode factor", "de factors", "done factor", "dage factor", "de factoor", "de faitor", "e factor"
"e factor" » "e factors", "one factor", "age factor"
"de factr" » "de facto", "de facteur", "de fazer", "de factor", "de faitr", "e factr"
"de fact" » "de facto", "de fait", "e fact"
"le fait" » "le faict"

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