Perhaps you should try some spelling variations:
"mode factor" » "model factor", "models factor", "model factors", "mode factors", "modone factor", "modage factor", "mode factr", "mode factsr"
"de factsr" » "de facteur", "de faits"
"e factor" » "e factors", "one factor", "age factor", "e factr", "e factsr"
"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 facto") OR ((((("e factor") OR ("mode factor"))) OR ("de factsr")))).
• Removing quotes may allow a broader search: (( de facto ) or ((((( e factor ) or ( mode factor ))) or ( de factsr )))).
• Adding a wildcard symbol may retrieve word variants: (("de facto") or ((((("e factor") or ("mode factor"))) or ("de factsr"))))*.