Perhaps you should try some spelling variations:
comparative macroeconomic » comprehensive macroeconomic, comparative economics, alternative macroeconomic
macroeconomic series » macroeconomic theories, macroeconomic crises, macroeconomic systems
comparative economic » comparative genomic, comparative genomics
talk comparative » tank comparative, italy comparative, dark comparative
world tank » world bank, world tasks, world frank
world task » world tasks, worlds task, world mask
world talk » world tasks, world take, world till

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 tank) OR (world task)) comparative macroeconomic series ) OR ( the world talk comparative economic studies )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the ((world tank) OR (world task)) comparative macroeconomic series ) or ( the world talk comparative economic studies ))".
• Adding a wildcard symbol may retrieve word variants: (( the ((world tank) OR (world task)) comparative macroeconomic series ) or ( the world talk comparative economic studies ))*.