Perhaps you should try some spelling variations:
"six factor" » "six factors", "sex factor", "sex factors", "sx factor", "ssix factors", "ssex factor"
"dex facto" » "de facto", "sex factor", "dux factor", "dsex factor", "dde facto", "dx factor"
"dx factor" » "dux factor", "x factor", "sex factor"
"ix factor" » "x factor", "six factors", "sex factor"
"ex facto" » "sex factor", "de facto", "x factor"
"e facto" » "de facto", "e factor", "e fact"
"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: (((((("e facto") OR ((("dex facto") OR ("dx factor"))))) OR ((("e facto") OR ((("ex facto") OR ((("ix factor") OR ("six factor"))))))))) OR ("de fact")).
• Removing quotes may allow a broader search: (((((( e facto ) or ((( dex facto ) or ( dx factor ))))) or ((( e facto ) or ((( ex facto ) or ((( ix factor ) or ( six factor ))))))))) or ( de fact )).
• Adding a wildcard symbol may retrieve word variants: (((((("e facto") or ((("dex facto") or ("dx factor"))))) or ((("e facto") or ((("ex facto") or ((("ix factor") or ("six factor"))))))))) or ("de fact"))*.