Perhaps you should try some spelling variations:
"de factor" » "de facto", "dose factor", "mode factor", "de factors", "done factor", "dage factor", "dde factor", "dex factor", "de factr", "de factoor", "de faitor", "e factor"
"e factor" » "e factors", "one factor", "age factor", "de factor", "ex factor", "e factr"
"e factsr" » "e factors", "e factory", "e fact"
"e facto" » "de facto", "ex facto", "e fact"
"de fact" » "de facto", "de fait", "e fact"

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