Perhaps you should try some spelling variations:
"de factor" » "e factor", "dose factor", "mode factor", "d_ factor", "da factor", "d3 factor", "de factsr"
"de faito" » "de fait", "de faits", "de fato"
"da fact" » "a fact", "data fact", "da feast"
"e fact" » "_ fact", "a fact", "3 fact"
"de facto" » "d_ facto", "da facto", "d3 facto", "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 factor") OR ("de faito"))) OR ((((("da fact") OR ("e fact"))) OR ("de facto")))).
• Removing quotes may allow a broader search: (((( de factor ) or ( de faito ))) or ((((( da fact ) or ( e fact ))) or ( de facto )))).
• Adding a wildcard symbol may retrieve word variants: (((("de factor") or ("de faito"))) or ((((("da fact") or ("e fact"))) or ("de facto"))))*.