Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor", "dose factors", "dosone factor", "dosage factor"
"de factor" » "de facto", "mode factor", "de factores", "de factors", "done factor", "dage factor", "de factoor", "de faitor", "e factor"
"e factor" » "e factors", "one factor", "age factor"
"de faito" » "de facto", "de fait", "de faits"
"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 ("dose factor"))) OR ("e factor"))) OR ("de faito"))) OR ("de fact")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((\"de factor\") OR (\"dose factor\"))) or (\"e factor\"))) or (\"de faito\"))) or (\"de fact\"))".
• Removing quotes may allow a broader search: (((((((( de factor ) OR ( dose factor ))) or ( e factor ))) or ( de faito ))) or ( de fact )).
• Adding a wildcard symbol may retrieve word variants: (((((((("de factor") OR ("dose factor"))) or ("e factor"))) or ("de faito"))) or ("de fact"))*.