Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor", "dose factors", "dosone factor", "dosage factor", "dos_ factor", "dosa factor", "dos3 factor"
"e factor" » "e factors", "one factor", "age factor", "_ factor", "a factor", "3 factor"
"ex facto" » "sex factor", "ix factor", "x factor"
"de facto" » "de faito", "de falcoo", "de facono", "d_ facto", "da facto", "d3 facto"
"de fact" » "de fait", "de falco", "de facon", "d_ fact", "da fact", "d3 fact"
"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 ("dose factor"))) OR ((("de facto") OR ((("ex facto") OR ("e fact"))))))) OR ("de fact")).
• Removing quotes may allow a broader search: (((((( e factor ) or ( dose factor ))) or ((( de facto ) or ((( ex facto ) or ( e fact ))))))) or ( de fact )).
• Adding a wildcard symbol may retrieve word variants: (((((("e factor") or ("dose factor"))) or ((("de facto") or ((("ex facto") or ("e fact"))))))) or ("de fact"))*.