Perhaps you should try some spelling variations:
het internationaal » _ international (Expand Search)
de internationale » _ international (Expand Search)
internationale de » internationale des (Expand Search), international de (Expand Search)
et international » et internationale (Expand Search), en internationale (Expand Search), _ international (Expand Search)
de prize » de prijzen (Expand Search), de prince (Expand Search), de prijs (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: "(( de internationale de prize ) OR ( ((et international) OR (het internationaal)) seminar prize ))~".
• Adding a wildcard symbol may retrieve word variants: (( de internationale de prize ) OR ( ((et international) OR (het internationaal)) seminar prize ))*.