Perhaps you should try some spelling variations:
"mode factor" » "model factor", "models factor", "model factory", "mode factors", "modone factor", "modage factor"
"dose factor" » "noise factor", "one factor", "moore factor", "dose factors", "dosone factor", "dosage factor"
"e factor" » "e factors", "one factor", "age factor"
"de fait" » "de faits", "le fait", "se fait"

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: (((((("e factor") OR ("mode factor"))) OR ("dose factor"))) OR ("de fait")).
• Removing quotes may allow a broader search: (((((( e factor ) or ( mode factor ))) or ( dose factor ))) or ( de fait )).
• Adding a wildcard symbol may retrieve word variants: (((((("e factor") or ("mode factor"))) or ("dose factor"))) or ("de fait"))*.