Perhaps you should try some spelling variations:
"Cardiac arrest" » "Cardiac arrese", "Cardiac agrest", "Cardiac arrestar"
"Cardiac arresto" » "Cardiac arreseo", "Cardiac agresto", "Cardiac arrestaro"
"Cardiac arrestado" » "Cardiac arreseado", "Cardiac agrestado", "Cardiac arrestarado", "Cardiac prestado"
"Cardiac arresear" » "Cardiac arrestar", "Cardiac arriesgar", "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 arresear"))) OR ((("Cardiac arresto") OR ("Cardiac arrestado"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Cardiac arrest\") OR (\"Cardiac arresear\"))) OR (((\"Cardiac arresto\") OR (\"Cardiac arrestado\"))))".
• Removing quotes may allow a broader search: (((( Cardiac arrest ) OR ( Cardiac arresear ))) OR ((( Cardiac arresto ) OR ( Cardiac arrestado )))).
• Adding a wildcard symbol may retrieve word variants: (((("Cardiac arrest") OR ("Cardiac arresear"))) OR ((("Cardiac arresto") OR ("Cardiac arrestado"))))*.