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

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