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