Perhaps you should try some spelling variations:
"het eerste internationale dag festival" » "het de internationale dag festival" (Expand Search), "het eerste internationale des festival" (Expand Search), "het eerste internationale de festival" (Expand Search), "het eerste international de festival" (Expand Search), "het eerste internationale du festival" (Expand Search), "het eerste internationale a festival" (Expand Search), "het eerste internationale van festival" (Expand Search), "de eerste internationale dag festival" (Expand Search)
"en _ international dour festival" » "en _ international group festival" (Expand Search), "en _ international de festival" (Expand Search), "en _ international day festival" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("het eerste internationale dag festival") OR ("en _ international dour festival"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"het eerste internationale dag festival\") OR (\"en _ international dour festival\"))*".
• Removing quotes may allow a broader search: (( het eerste internationale dag festival ) OR ( en _ international dour festival ))*.