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