Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor", "dose factors", "dosone factor", "dosage factor", "dosex factor", "dose factr", "dos5 factor"
"e factor" » "e factors", "one factor", "age factor", "ex factor", "e factr", "5 factor"
"de facto" » "de faito", "e facto", "de falcoo", "dex facto", "de fact", "d5 facto"
"de fact" » "de fait", "e fact", "de falco"
"e facto" » "ex facto", "e fact", "5 facto"

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