Perhaps you should try some spelling variations:
"het eerste internationale du festival" » "het de internationale du festival" (Expand Search), "het eerste internationale des festival" (Expand Search), "het eerste international de festival" (Expand Search), "het eerste internationale dour festival" (Expand Search), "de eerste internationale du festival" (Expand Search)
"en _ international het festival" » "en _ international met festival" (Expand Search), "en _ international zet festival" (Expand Search), "en _ international de festival" (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 eerste internationale du festival\") OR (\"en _ international het festival\"))~".
• Removing quotes may allow a broader search: (( het eerste internationale du festival ) OR ( en _ international het festival ))~.
• Adding a wildcard symbol may retrieve word variants: (("het eerste internationale du festival") OR ("en _ international het festival"))*.