Perhaps you should try some spelling variations:
"e factor" » "e factors", "one factor", "age factor", "de factor", "ex factor", "e factr"
"de faits" » "des faits", "les faits", "de traits", "le faits", "se faits", "du faits"
"e facto" » "de facto", "ex facto", "e fact"
"de fait" » "le fait", "se fait", "du fait"

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