Perhaps you should try some spelling variations:
"de factor" » "e factor", "dose factor", "mode factor", "de factr", "de factsr"
"de factr" » "de facteur", "de fair", "de fait"
"de fazer" » "de fer"
"de facon" » "de falco", "la facon", "en facon"
"de facto" » "de fact", "de facts"

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