Perhaps you should try some spelling variations:
national conference » international conference
regional conference » regional convergence, regional differences, global conference
regional resilience » regional science, operational resilience

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: algarve ((((regional conference) OR (national conference))) OR (regional resilience)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "algarve ((((regional conference) OR (national conference))) or (regional resilience))".
• Adding a wildcard symbol may retrieve word variants: algarve ((((regional conference) OR (national conference))) or (regional resilience))*.