Perhaps you should try some spelling variations:
"mode factsres" » "model factories", "mode failures", "model factors"
"mode fracture" » "bone fracture", "bone fractures"
"de factor" » "e factor", "dose factor", "mode factor", "de factr", "de factsr"
"de facto" » "de fact", "de facts"

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