Perhaps you should try some spelling variations:
2.2 institutions » 2.2 institution, 3.2 institutions, 7.2 institutions
2.3 institutions » 2.3 institutional, 13 institutions, 3.3 institution
c institutions » c institution, 8 institutions, 7 institutions
2c etc » 29 etc, qc etc

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "%22associations%((((2.2 institutions) OR (2.3 institutions))) OR (c institutions))%2c etc %_ bolivia%22".
• Adding a wildcard symbol may retrieve word variants: %22associations%((((2.2 institutions) OR (2.3 institutions))) OR (c institutions))%2c etc %_ bolivia%22*.