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