Perhaps you should try some spelling variations:
dose factor » noise factor, one factor, mode factor
de factor » e factor, mode factor, de factores
de fact » de fait, e fact, de falco
factor » factsr
facto » facts

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