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