Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor", "dose factr", "dose factsr"
"de facteur" » "de facteurs", "le facteur", "du facteur"
"de faito" » "de fait", "de faits", "de fato"
"de factoor" » "de factor", "de factsor"
"de facto" » "de fact", "de facts"

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