Perhaps you should try some spelling variations:
"de factor" » "de facto", "dose factor", "mode factor", "de factors", "done factor", "dage factor", "de factoor", "e factor", "de faconor"
"e factor" » "e factors", "one factor", "age factor"
"de faito" » "de facto", "de faits", "de fato", "de faitso", "le faito", "se faito"
"de falco" » "de facto"
"de fact" » "de facto", "e fact", "de 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 ("e factor"))) OR ("de faito"))) OR ((((("de fact") OR ("de falco"))) OR ("de fait")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"de factor\") or (\"e factor\"))) or (\"de faito\"))) or (((((\"de fact\") OR (\"de falco\"))) or (\"de fait\"))))".
• Removing quotes may allow a broader search: (((((( de factor ) or ( e factor ))) or ( de faito ))) or ((((( de fact ) OR ( de falco ))) or ( de fait )))).
• Adding a wildcard symbol may retrieve word variants: (((((("de factor") or ("e factor"))) or ("de faito"))) or ((((("de fact") OR ("de falco"))) or ("de fait"))))*.