Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor", "dose factors", "dosone factor", "dosage factor"
"de faito" » "de facto", "de fait", "de faits"
"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: (((("de faito") OR ("de fact"))) OR ((("e factor") OR ("dose factor")))).
• Removing quotes may allow a broader search: (((( de faito ) or ( de fact ))) or ((( e factor ) or ( dose factor )))).
• Adding a wildcard symbol may retrieve word variants: (((("de faito") or ("de fact"))) or ((("e factor") or ("dose factor"))))*.