Perhaps you should try some spelling variations:
comparative macroeconomic » comparative economic, comprehensive macroeconomic, comparative economics
macroeconomic studies » microeconomic studies, macroeconomic series, macroeconomic sources
acid comparative » based comparative, blind comparative, d comparative
data comparative » a comparative, data comparing
world acid » world ai, world act, world ad

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: (( the world acid comparative macroeconomic studies ) OR ( the world data comparative macroeconomic studies )).
• Adding a wildcard symbol may retrieve word variants: (( the world acid comparative macroeconomic studies ) or ( the world data comparative macroeconomic studies ))*.