Perhaps you should try some spelling variations:
"de factoor" » "de facto", "de facteur", "de factooor", "de faitoor", "e factoor"
"de factor" » "de facto", "e factor", "dose factor", "de factoor", "de faitor"
"de faito" » "de facto", "de fait", "de faits"
"de fact" » "de facto", "de fait", "e fact"

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 factoor"))) OR ("de faito"))) OR ("de fact")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"de factor\") OR (\"de factoor\"))) or (\"de faito\"))) or (\"de fact\"))".
• Removing quotes may allow a broader search: (((((( de factor ) OR ( de factoor ))) or ( de faito ))) or ( de fact )).
• Adding a wildcard symbol may retrieve word variants: (((((("de factor") OR ("de factoor"))) or ("de faito"))) or ("de fact"))*.