Perhaps you should try some spelling variations:
"de factor" » "e factor", "dose factor", "mode factor"
"d_ facto" » "_ facts", "_ fact", "_ factor"
"3 fact" » "3 facts", "3 fast", "3 face"
"5 fact" » "5 facts", "5 fast", "5 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 factor") OR ((("de facto") OR ("d_ facto"))))) OR ((("3 fact") OR ("5 fact")))).
• Removing quotes may allow a broader search: (((( de factor ) or ((( de facto ) or ( d_ facto ))))) or ((( 3 fact ) or ( 5 fact )))).
• Adding a wildcard symbol may retrieve word variants: (((("de factor") or ((("de facto") or ("d_ facto"))))) or ((("3 fact") or ("5 fact"))))*.