Perhaps you should try some spelling variations:
"e factor" » "e factors", "one factor", "age factor", "_ factor", "a factor", "3 factor", "e factsr"
"e factsr" » "e factors", "e factory", "e faktor", "_ factsr", "a factsr", "3 factsr"
"de fait" » "de faits", "le fait", "se fait"
"de facto" » "d_ facto", "da facto", "d3 facto", "de facts"
"e fact" » "_ fact", "a fact", "3 fact"

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