Perhaps you should try some spelling variations:
"internationale conferentie opposition" » "international conference opposition" (Expand Search)
"internationale dag opposition" » "international a opposition" (Expand Search), "internationale d'ete opposition" (Expand Search)
"internationale des opposition" » "internationale d'ete opposition" (Expand Search), "internationale de l'opposition" (Expand Search)
"internationale de opposition" » "internationale de l'opposition" (Expand Search), "internationale d'ete opposition" (Expand Search)
"international de opposition" » "international de l'opposition" (Expand Search), "international d'ete opposition" (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: (((("internationale des opposition") OR ((((("internationale dag opposition") OR ((("internationale de opposition") OR ("international de opposition"))))) OR ("internationale conferentie opposition"))))) OR ("internationale des propositions"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"internationale des opposition\") OR (((((\"internationale dag opposition\") OR (((\"internationale de opposition\") OR (\"international de opposition\"))))) OR (\"internationale conferentie opposition\"))))) OR (\"internationale des propositions\"))".
• Removing quotes may allow a broader search: (((( internationale des opposition ) OR ((((( internationale dag opposition ) OR ((( internationale de opposition ) OR ( international de opposition ))))) OR ( internationale conferentie opposition ))))) OR ( internationale des propositions )).
• Adding a wildcard symbol may retrieve word variants: (((("internationale des opposition") OR ((((("internationale dag opposition") OR ((("internationale de opposition") OR ("international de opposition"))))) OR ("internationale conferentie opposition"))))) OR ("internationale des propositions"))*.