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