Perhaps you should try some spelling variations:
internationale seminar » international seminar (Expand Search), internationaal seminarie (Expand Search), internationale mars (Expand Search)
internationale meeting » international meeting (Expand Search), internationale samenwerking (Expand Search)
de internationale » _ international (Expand Search)
en internationale » _ international (Expand Search), het internationaal (Expand Search), eerste internationale (Expand Search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( de internationale seminar prize ) OR ( en internationale meeting prize ))*.