Perhaps you should try some spelling variations:
"de factor" » "dose factor", "mode factor", "de factores", "de factors", "dage factor", "de faitor", "e factor", "de falcoor", "de factsr"
"e factor" » "e factors", "age factor", "e factsr"
"one factor" » "one factors", "onage factor", "one factsr"
"de fact" » "de fait", "e fact", "de falco"
"de facto" » "de faito", "e facto", "de falcoo", "de facts"

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 factor") OR ("de facto"))) OR ((("e factor") OR ("one factor")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"de fact\") or (((((\"de factor\") OR (\"de facto\"))) or (((\"e factor\") or (\"one factor\"))))))".
• Removing quotes may allow a broader search: (( de fact ) or ((((( de factor ) OR ( de facto ))) or ((( e factor ) or ( one factor )))))).
• Adding a wildcard symbol may retrieve word variants: (("de fact") or ((((("de factor") OR ("de facto"))) or ((("e factor") or ("one factor"))))))*.