Perhaps you should try some spelling variations:
"dose factor" » "one factor", "mode factor", "moore factor", "dose factorr", "dosex factor", "dose factr"
"de fact" » "de fait", "e fact", "de falco"
"de facto" » "de faito", "e facto", "de falcoo", "de factor", "dex facto", "de fact"
"noise factor" » "noise factorr", "noisex factor", "noise factr"
"e facto" » "e factor", "ex facto", "e 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: (((("dose factor") OR ("noise factor"))) OR ((("de fact") OR ((("de facto") OR ("e facto")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dose factor\") or (\"noise factor\"))) or (((\"de fact\") or (((\"de facto\") OR (\"e facto\"))))))".
• Removing quotes may allow a broader search: (((( dose factor ) or ( noise factor ))) or ((( de fact ) or ((( de facto ) OR ( e facto )))))).
• Adding a wildcard symbol may retrieve word variants: (((("dose factor") or ("noise factor"))) or ((("de fact") or ((("de facto") OR ("e facto"))))))*.