Perhaps you should try some spelling variations:
"15 factor" » "15 factors", "5 factor", "14 factor"
"12 factor" » "12 factors", "2 factor", "1.2 factors"
"de facon" » "de facto", "de falco", "la facon"
"de fact" » "de facto", "de fait", "de falco", "d_ fact", "da fact", "d5 fact"
"da fact" » "a fact", "data fact", "law fact"
"e fact" » "_ fact", "a fact", "5 fact"
"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 ("12 factor"))) OR ("de facon"))) OR ((((("de fact") OR ("da fact"))) OR ((("e fact") OR ((("3 fact") OR ("3 face"))))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"15 factor\") OR (\"12 factor\"))) or (\"de facon\"))) or (((((\"de fact\") or (\"da fact\"))) or (((\"e fact\") or (((\"3 fact\") or (\"3 face\"))))))))*".
• Removing quotes may allow a broader search: (((((( 15 factor ) OR ( 12 factor ))) or ( de facon ))) or ((((( de fact ) or ( da fact ))) or ((( e fact ) or ((( 3 fact ) or ( 3 face ))))))))*.