Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor"
"de factoor" » "de facto", "de facteur", "de factooor", "e factoor", "de faconoor"
"de factor" » "de facto", "e factor", "mode factor", "de factoor", "de faconor"
"de falco" » "de facto"
"de factr" » "de facto", "de facteur", "de fazer", "de factor", "e factr", "de faconr", "de fact", "de factors"
"de fact" » "de facto", "e fact", "de facon"
"de fait" » "de faits", "le fait", "se fait"
"e factr" » "e factor", "e fact", "e factors"

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