Perhaps you should try some spelling variations:
"e factoor" » "e factors", "e faktor", "e factory", "e factor", "e factsor"
"de facon" » "de falco", "la facon", "en facon"
"e factor" » "e factors", "one factor", "age factor", "e factr", "e factsr"
"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 facon"))) OR ((("e factoor") OR ("e factor")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"de facto\") or (\"de facon\"))) or (((\"e factoor\") OR (\"e factor\"))))".
• Removing quotes may allow a broader search: (((( de facto ) or ( de facon ))) or ((( e factoor ) OR ( e factor )))).
• Adding a wildcard symbol may retrieve word variants: (((("de facto") or ("de facon"))) or ((("e factoor") OR ("e factor"))))*.