Perhaps you should try some spelling variations:
"Cardiac arrest" » "Cardiac arrese", "Cardiac agrest", "Cardiac arrestar"
"Cardiac arresto" » "Cardiac arreseo", "Cardiac agresto", "Cardiac arrestaro"
"Cardiac arrested" » "Cardiac arreseed", "Cardiac agrested", "Cardiac arrestared", "Cardiac arrestado", "Cardiac arrestada", "Cardiac agreste"
"Cardiac arreseo" » "Cardiac arrese"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("Cardiac arrest") OR ((((("Cardiac arresto") OR ("Cardiac arreseo"))) OR ("Cardiac arrested"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Cardiac arrest\") OR (((((\"Cardiac arresto\") OR (\"Cardiac arreseo\"))) OR (\"Cardiac arrested\"))))".
• Removing quotes may allow a broader search: (( Cardiac arrest ) OR ((((( Cardiac arresto ) OR ( Cardiac arreseo ))) OR ( Cardiac arrested )))).
• Adding a wildcard symbol may retrieve word variants: (("Cardiac arrest") OR ((((("Cardiac arresto") OR ("Cardiac arreseo"))) OR ("Cardiac arrested"))))*.