Perhaps you should try some spelling variations:
"de factor" » "de facto", "dose factor", "mode factor", "de factors", "dage factor", "de factoor", "e factor", "de falcoor"
"e factor" » "e factors", "age factor"
"one factor" » "one factors", "onage factor"
"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 ("one 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 (\"one factor\"))))))".
• Removing quotes may allow a broader search: (((( de fact ) OR ( de fait ))) or ((( de factor ) or ((( e factor ) or ( one factor )))))).
• Adding a wildcard symbol may retrieve word variants: (((("de fact") OR ("de fait"))) or ((("de factor") or ((("e factor") or ("one factor"))))))*.