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