Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor", "dos_ factor", "dosa factor", "dos3 factor", "dose factsr"
"de factor" » "e factor", "mode factor", "de factores", "de faitor", "de falcoor", "de faconor", "d_ factor", "da factor", "d3 factor", "de factsr"
"de facto" » "de faito", "de falcoo", "de facono", "d_ facto", "da facto", "d3 facto", "de facts"
"de fact" » "de fait", "de falco", "de facon", "d_ fact", "da fact", "d3 fact"
"e fact" » "_ fact", "a fact", "3 fact"

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 fact") OR ("e fact"))))) OR ((("de factor") OR ("dose factor")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"de facto\") or (((\"de fact\") OR (\"e fact\"))))) or (((\"de factor\") or (\"dose factor\"))))".
• Removing quotes may allow a broader search: (((( de facto ) or ((( de fact ) OR ( e fact ))))) or ((( de factor ) or ( dose factor )))).
• Adding a wildcard symbol may retrieve word variants: (((("de facto") or ((("de fact") OR ("e fact"))))) or ((("de factor") or ("dose factor"))))*.