Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor"
"de factor" » "e factor", "mode factor", "de factores"
"de facts" » "de faits", "cbe facts", "de fautes"
"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 facto") OR ("de facts"))) OR ((("de factor") OR ("dose factor"))))) OR ("3 fact")).
• Removing quotes may allow a broader search: (((((( de facto ) or ( de facts ))) or ((( de factor ) or ( dose factor ))))) or ( 3 fact )).
• Adding a wildcard symbol may retrieve word variants: (((((("de facto") or ("de facts"))) or ((("de factor") or ("dose factor"))))) or ("3 fact"))*.