Perhaps you should try some spelling variations:
"mode factor" » "model factor", "models factor", "model factory", "modone factor", "modage factor", "mode factr", "mode factsr"
"e factors" » "age factors", "like factors", "male factors", "one factors", "e factrs", "e factsrs"
"e factor" » "one factor", "age factor", "e factr", "e factsr"
"de facto" » "de fact", "de 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: (((("mode factor") OR ((("e factor") OR ("e factors"))))) OR ("de facto")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"mode factor\") or (((\"e factor\") OR (\"e factors\"))))) or (\"de facto\"))".
• Removing quotes may allow a broader search: (((( mode factor ) or ((( e factor ) OR ( e factors ))))) or ( de facto )).
• Adding a wildcard symbol may retrieve word variants: (((("mode factor") or ((("e factor") OR ("e factors"))))) or ("de facto"))*.