Perhaps you should try some spelling variations:
"Cardiac arrest" » "Cardiac arresto", "Cardiac arrested"
"Cardiac arrestar" » "Cardiac arrestoar", "Cardiac arrestedar", "Cardiac arriesgar", "Cardiac prestar", "Cardiac arresto"
"Cardiac aprestar" » "Cardiac prestar", "Cardiac apresar", "Cardiac apresentar"
"Cardiac arrese" » "Cardiac arese"

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 arrestar") OR ("Cardiac aprestar"))))) OR ("Cardiac arrese"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Cardiac arrest\") OR (((\"Cardiac arrestar\") OR (\"Cardiac aprestar\"))))) OR (\"Cardiac arrese\"))".
• Removing quotes may allow a broader search: (((( Cardiac arrest ) OR ((( Cardiac arrestar ) OR ( Cardiac aprestar ))))) OR ( Cardiac arrese )).
• Adding a wildcard symbol may retrieve word variants: (((("Cardiac arrest") OR ((("Cardiac arrestar") OR ("Cardiac aprestar"))))) OR ("Cardiac arrese"))*.