Perhaps you should try some spelling variations:
"de facteur" » "de facteurs", "le facteur", "du facteur", "de factoeur", "de faiteur", "e facteur"
"de factr" » "de facto", "de fazer", "de facon", "de factor", "de faitr", "e factr"
"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 factr\") OR (\"de facteur\"))))".
• Removing quotes may allow a broader search: (( de fact ) OR ((( de factr ) OR ( de facteur )))).
• Adding a wildcard symbol may retrieve word variants: (("de fact") OR ((("de factr") OR ("de facteur"))))*.