Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "mode factor", "moore factor", "dose factr", "dose factsr"
"de factsr" » "de facteur", "de faits"
"de facto" » "de fact", "de facts"
"one factor" » "one factr", "one factsr"

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