Perhaps you should try some spelling variations:
"cost of _ health adults" » "cost of _ health adult", "cost of _ healthy adult", "cost of _ health results"
"cost of _ healthy dies" » "cost of _ healthy diets", "cost of _ healthy ties", "cost of _ healthy aims"
"cost of _ healthy 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 adults") OR ("cost of _ health adults")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"cost of _ healthy dies\") or (\"cost of _ healthy diet\"))) or (((\"cost of _ healthy adults\") OR (\"cost of _ health adults\"))))".
• Removing quotes may allow a broader search: (((( cost of _ healthy dies ) or ( cost of _ healthy diet ))) or ((( cost of _ healthy adults ) OR ( cost of _ health adults )))).
• Adding a wildcard symbol may retrieve word variants: (((("cost of _ healthy dies") or ("cost of _ healthy diet"))) or ((("cost of _ healthy adults") OR ("cost of _ health adults"))))*.