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