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 _ healthy dies" » "cost of _ healthy diet", "cost of _ healthy ties", "cost of _ healthy aims"
"cost of _ health dies" » "cost of _ health diet", "cost of _ health die", "cost of _ health does"

Try widening your search to All Fields.

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 _ healthy dies") OR ("cost of _ health dies"))) OR ("cost of _ healthy diets")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"cost of _ healthy dies\") OR (\"cost of _ health dies\"))) or (\"cost of _ healthy diets\"))".
• Removing quotes may allow a broader search: (((( cost of _ healthy dies ) OR ( cost of _ health dies ))) or ( cost of _ healthy diets )).
• Adding a wildcard symbol may retrieve word variants: (((("cost of _ healthy dies") OR ("cost of _ health dies"))) or ("cost of _ healthy diets"))*.