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