Perhaps you should try some spelling variations:
"e factor" » "e factors", "one factor", "age factor"
"de factr" » "de facto", "de facteur", "de fazer", "de factor", "e factr", "de falcor"
"de fact" » "de facto", "e fact", "de falco"
"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 fait"))) OR ((((("e factor") OR ("e factor"))) OR ("de factr")))).
• Removing quotes may allow a broader search: (((( de fact ) or ( de fait ))) or ((((( e factor ) or ( e factor ))) or ( de factr )))).
• Adding a wildcard symbol may retrieve word variants: (((("de fact") or ("de fait"))) or ((((("e factor") or ("e factor"))) or ("de factr"))))*.