Perhaps you should try some spelling variations:
5 institutionelle » 2 institutionelle, 1 institutionelle, und institutionelle
2.3 institutions » 2.3 institutional, 13 institutions, 3.3 institution
5 institutions » 5 institutional, 5 institutionen
c institutions » c institution, 8 institutions, 7 institutions
2c etc » 29 etc, qc etc

Try widening your search to All Fields.

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: %22associations%((((((((5 institutions) OR (5 institutionelle))) OR (2((5 institutions) OR (5 institutionelle))))) OR (2.3 institutions))) OR (c institutions))%2c etc %_ bolivia%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22associations%((((((((5 institutions) OR (5 institutionelle))) or (2((5 institutions) OR (5 institutionelle))))) or (2.3 institutions))) or (c institutions))%2c etc %_ bolivia%22".
• Adding a wildcard symbol may retrieve word variants: %22associations%((((((((5 institutions) OR (5 institutionelle))) or (2((5 institutions) OR (5 institutionelle))))) or (2.3 institutions))) or (c institutions))%2c etc %_ bolivia%22*.