Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor"
"de factor" » "de facto", "e factor", "mode factor"
"de faito" » "de facto", "de fait", "de faits"
"3 fact" » "3 facts", "3 fast", "3 face"

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 ("de faito"))) OR ("3 fact")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"de factor\") OR (\"dose factor\"))) or (\"de faito\"))) or (\"3 fact\"))".
• Removing quotes may allow a broader search: (((((( de factor ) OR ( dose factor ))) or ( de faito ))) or ( 3 fact )).
• Adding a wildcard symbol may retrieve word variants: (((((("de factor") OR ("dose factor"))) or ("de faito"))) or ("3 fact"))*.