Perhaps you should try some spelling variations:
2.3 institutional » 2.3 institutionell, 13 institutional, 2.3 institutions
2c institutions » 26 institutions, 2.3 institutions, 2.2 institutions
25 institutions » 5 institutions, 15 institutions, 2005 institutions
3.3 institution » 3.3 institutionen, 2.3 institutions, 3.3 konstitution
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%((((((2c institutions) OR (25 institutions))) OR (((2.3 institutional) OR (3.3 institution))))) OR (c institutions))%2c etc %_ bolivia%22".
• Adding a wildcard symbol may retrieve word variants: %22associations%((((((2c institutions) OR (25 institutions))) OR (((2.3 institutional) OR (3.3 institution))))) OR (c institutions))%2c etc %_ bolivia%22*.