Perhaps you should try some spelling variations:
"internationale conferentie opposition" » "international conference opposition" (Expand Search)
"internationale des opposition" » "internationale d'ete opposition" (Expand Search), "internationale de l'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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"internationale des opposition\") OR (\"internationale des propositions\"))) OR (((\"internationale politiek opposition\") OR (\"internationale conferentie opposition\"))))) OR (\"international de opposition\"))~".
• Removing quotes may allow a broader search: (((((( internationale des opposition ) OR ( internationale des propositions ))) OR ((( internationale politiek opposition ) OR ( internationale conferentie opposition ))))) OR ( international de opposition ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("internationale des opposition") OR ("internationale des propositions"))) OR ((("internationale politiek opposition") OR ("internationale conferentie opposition"))))) OR ("international de opposition"))*.