Perhaps you should try some spelling variations:
"cost of _ healthy diets" » "cost of _ healthy diet", "cost of _ healthy adults", "cost of _ healthy city"
"cost of _ health dies" » "cost of _ health diet", "cost of _ health die", "cost of _ health does"

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: (("cost of _ health dies") OR ("cost of _ healthy diets")).
• Removing quotes may allow a broader search: (( cost of _ health dies ) or ( cost of _ healthy diets )).
• Adding a wildcard symbol may retrieve word variants: (("cost of _ health dies") or ("cost of _ healthy diets"))*.