Perhaps you should try some spelling variations:
internationale seminar » international seminar (Expand Search), internationaal seminarie (Expand Search), internationale meeting (Expand Search)
een internationale » en internationale (Expand Search), de internationale (Expand Search), de international (Expand Search)
international de » internationale des (Expand Search)
international a » internationale de (Expand Search), internationale des (Expand Search)

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: "(( _ ((international a) OR (international de)) prize ) OR ( een internationale seminar prize ))~".
• Adding a wildcard symbol may retrieve word variants: (( _ ((international a) OR (international de)) prize ) OR ( een internationale seminar prize ))*.