Perhaps you should try some spelling variations:
"mode factsr" » "mode factor", "model factor", "modes factor", "mode faitsr", "moe factsr", "mode faconsr"
"de factor" » "e factor", "dose factor", "mode factor", "de faitor", "de faconor", "de factsr"
"de facto" » "de faito", "e facto", "de facono", "de facts"
"de fact" » "de fait", "e fact", "de facon"

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