Perhaps you should try some spelling variations:
"15 factor" » "15 factors", "12 factor", "5 factor"
"de facon" » "de facto", "de falco", "la facon"
"de fact" » "de facto", "de fait", "de falco", "d_ fact", "d5 fact", "d2 fact"
"da fact" » "data fact", "can fact", "da feast", "da face", "da factor"
"e fact" » "_ fact", "5 fact", "2 fact"
"a fact" » "a face", "a factor"
"3 fact" » "3 facts", "3 fast", "3 factor"

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: (((("15 factor") OR ("de facon"))) OR ((((("de fact") OR ("da fact"))) OR ((((("e fact") OR ("a fact"))) OR ((("3 fact") OR ("3 face"))))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"15 factor\") or (\"de facon\"))) or (((((\"de fact\") or (\"da fact\"))) or (((((\"e fact\") OR (\"a fact\"))) or (((\"3 fact\") or (\"3 face\"))))))))*".
• Removing quotes may allow a broader search: (((( 15 factor ) or ( de facon ))) or ((((( de fact ) or ( da fact ))) or ((((( e fact ) OR ( a fact ))) or ((( 3 fact ) or ( 3 face ))))))))*.