Perhaps you should try some spelling variations:
"de factoor" » "de facto", "de facteur"
"de falcoo" » "de falco", "die falcon", "de facto"
"de factor" » "de facto", "e factor", "dose factor"
"de fait" » "de faits", "le fait", "se fait"

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 falcoo") OR ("de fait"))) OR ((("de factor") OR ("de factoor")))).
• Removing quotes may allow a broader search: (((( de falcoo ) or ( de fait ))) or ((( de factor ) or ( de factoor )))).
• Adding a wildcard symbol may retrieve word variants: (((("de falcoo") or ("de fait"))) or ((("de factor") or ("de factoor"))))*.