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

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