Perhaps you should try some spelling variations:
internationaal seminarie » international seminar (Expand Search), international solidarity (Expand Search)
internationale seminar » international seminar (Expand Search), internationale meeting (Expand Search), internationale mars (Expand Search)
het internationaal » _ international (Expand Search)
de internationale » _ international (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: "(( het internationaal seminarie prize ) OR ( de internationale seminar prize ))~".
• Adding a wildcard symbol may retrieve word variants: (( het internationaal seminarie prize ) OR ( de internationale seminar prize ))*.