Perhaps you should try some spelling variations:
"de factor" » "de facto", "e factor", "dose factor", "de factoor", "de faitor"
"de falcor" » "de falco", "die falcon", "de facon"
"de faits" » "des faits", "de fait", "les faits"
"de fact" » "de facto", "de fait", "e fact"

You may be able to get more results by adjusting your search query.

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