Perhaps you should try some spelling variations:
"age factor" » "age factors", "male factor", "one factor", "age factsr"
"de faits" » "des faits", "de fait", "les faits"
"de facto" » "de faito", "e facto", "de falcoo", "de facts"
"de fact" » "de fait", "e fact", "de falco"

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