Perhaps you should try some spelling variations:
"sex factor" » "sex factors", "six factor", "six factors"
"dex facto" » "de facto", "ex facto", "dux factor"
"e factor" » "e factors", "one factor", "age factor"
"de fact" » "de facto", "de fait", "e 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: (((((("dex facto") OR ("sex factor"))) OR ("e factor"))) OR ("de fact")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"dex facto\") OR (\"sex factor\"))) or (\"e factor\"))) or (\"de fact\"))".
• Removing quotes may allow a broader search: (((((( dex facto ) OR ( sex factor ))) or ( e factor ))) or ( de fact )).
• Adding a wildcard symbol may retrieve word variants: (((((("dex facto") OR ("sex factor"))) or ("e factor"))) or ("de fact"))*.