Perhaps you should try some spelling variations:
"dose factor" » "one factor", "mode factor", "moore factor"
"de factor" » "de facto", "e factor", "mode factor", "de factoor", "de faitor"
"de facts" » "de facto", "de faits", "cbe facts", "de factos", "e facts"
"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 ("noise factor"))))) OR ("de facts"))) OR ("de fact")).
• Removing quotes may allow a broader search: (((((( de factor ) or ((( dose factor ) or ( noise factor ))))) or ( de facts ))) or ( de fact )).
• Adding a wildcard symbol may retrieve word variants: (((((("de factor") or ((("dose factor") or ("noise factor"))))) or ("de facts"))) or ("de fact"))*.