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

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