Perhaps you should try some spelling variations:
"de eerste internationale heus festival" » "de de internationale heus festival" (Expand Search), "de eerste internationale des festival" (Expand Search), "de eerste internationale hulp festival" (Expand Search), "de eerste internationale mars festival" (Expand Search), "de eerste internationale het festival" (Expand Search), "de eerste internationale wheels festival" (Expand Search), "de eerste internationale blues festival" (Expand Search)
"het _ internationale de festival" » "het _ internationale des festival" (Expand Search), "het _ international de festival" (Expand Search), "het _ internationale du festival" (Expand Search), "het _ internationale dj festival" (Expand Search), "het _ internationale doel 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 _ internationale de festival\") OR (\"de eerste internationale heus festival\"))~".
• Removing quotes may allow a broader search: (( het _ internationale de festival ) OR ( de eerste internationale heus festival ))~.
• Adding a wildcard symbol may retrieve word variants: (("het _ internationale de festival") OR ("de eerste internationale heus festival"))*.