Perhaps you should try some spelling variations:
"15 factor" » "15 factors", "12 factor", "5 factor", "15 factsor", "15 fastor", "15 faceor"
"de facon" » "de facto", "de falco", "la facon"
"de fait" » "de faits", "le fait", "se fait"
"da fact" » "a fact", "data fact", "can fact"
"e fact" » "_ fact", "a fact", "2 fact"
"5 fact" » "5 facts", "5 fast", "5 face"
"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 fait") OR ("da fact"))) OR ((((("e fact") OR ("5 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 fait\") or (\"da fact\"))) or (((((\"e fact\") OR (\"5 fact\"))) or (((\"3 fact\") or (\"3 face\"))))))))".
• Removing quotes may allow a broader search: (((( 15 factor ) or ( de facon ))) or ((((( de fait ) or ( da fact ))) or ((((( e fact ) OR ( 5 fact ))) or ((( 3 fact ) or ( 3 face )))))))).
• Adding a wildcard symbol may retrieve word variants: (((("15 factor") or ("de facon"))) or ((((("de fait") or ("da fact"))) or ((((("e fact") OR ("5 fact"))) or ((("3 fact") or ("3 face"))))))))*.