Perhaps you should try some spelling variations:
"sex factor" » "sex factors", "six factor", "six factors"
"e facto" » "de facto", "e factor", "ex facto", "a facto", "3 facto", "5 facto"
"e fact" » "a fact", "3 fact", "5 fact"
"_ fact" » "_ facts", "_ face"

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 ("sex factor"))) OR ((("e fact") OR ("_ fact")))).
• Removing quotes may allow a broader search: (((( e facto ) or ( sex factor ))) or ((( e fact ) or ( _ fact )))).
• Adding a wildcard symbol may retrieve word variants: (((("e facto") or ("sex factor"))) or ((("e fact") or ("_ fact"))))*.