Perhaps you should try some spelling variations:
"het eerste internationale het festival" » "het de internationale het festival" (Expand Search), "het eerste internationale des festival" (Expand Search), "het eerste internationale de festival" (Expand Search), "het eerste international met festival" (Expand Search), "de eerste internationale het festival" (Expand Search)
"het _ international dour festival" » "het _ international group festival" (Expand Search), "het _ international de festival" (Expand Search), "het _ 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 _ international dour festival") OR ("het eerste internationale het festival"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"het _ international dour festival\") OR (\"het eerste internationale het festival\"))*".
• Removing quotes may allow a broader search: (( het _ international dour festival ) OR ( het eerste internationale het festival ))*.