Perhaps you should try some spelling variations:
"de factor" » "de facto", "dose factor", "mode factor", "de factors", "done factor", "dage factor", "de factoor", "e factor", "de falcoor"
"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 ((((("de factor") OR ("e factor"))) OR ((("de factr") OR ((("de factor") OR ("e factor")))))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"de fact\") or (\"de fait\"))) or (((((\"de factor\") OR (\"e factor\"))) or (((\"de factr\") or (((\"de factor\") OR (\"e factor\"))))))))".
• Removing quotes may allow a broader search: (((( de fact ) or ( de fait ))) or ((((( de factor ) OR ( e factor ))) or ((( de factr ) or ((( de factor ) OR ( e factor )))))))).
• Adding a wildcard symbol may retrieve word variants: (((("de fact") or ("de fait"))) or ((((("de factor") OR ("e factor"))) or ((("de factr") or ((("de factor") OR ("e factor"))))))))*.