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