Perhaps you should try some spelling variations:
"het eerste internationale de festival" » "het de internationale de festival" (Expand Search), "het eerste internationale des festival" (Expand Search), "het eerste international de festival" (Expand Search), "het eerste internationale du festival" (Expand Search), "het eerste internationale dj festival" (Expand Search), "het eerste internationale doel festival" (Expand Search), "de eerste internationale de festival" (Expand Search)
"een eerste internationale heus festival" » "een de internationale heus festival" (Expand Search), "een eerste internationale des festival" (Expand Search), "een eerste internationale hulp festival" (Expand Search), "een eerste internationale mars festival" (Expand Search), "een eerste internationale het festival" (Expand Search), "een eerste internationale wheels festival" (Expand Search), "een eerste internationale blues festival" (Expand Search), "de eerste internationale heus 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 de festival") OR ("een eerste internationale heus festival"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"het eerste internationale de festival\") OR (\"een eerste internationale heus festival\"))*".
• Removing quotes may allow a broader search: (( het eerste internationale de festival ) OR ( een eerste internationale heus festival ))*.