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

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