Perhaps you should try some spelling variations:
usa internationale » a internationale, europa internationale, iiasa international
pollen competition » open competition, policy competition, pollen collection
usa international » asia international, ima international, a international

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: "((usa international) OR (usa internationale)) pollen competition".
• Adding a wildcard symbol may retrieve word variants: ((usa international) OR (usa internationale)) pollen competition*.