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 de l'opposition" » "international de l'opposition" (Expand Search)
"internationale de opposition" » "international de opposition" (Expand Search), "internationale d'ete opposition" (Expand Search)
"internationale des propositions" » "international des propositions" (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 de l'opposition"))) OR ("internationale de opposition"))) OR ("internationale des propositions"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((\"internationale contre opposition\") OR (\"internationale politiek opposition\"))) OR (\"internationale de l'opposition\"))) OR (\"internationale de opposition\"))) OR (\"internationale des propositions\"))*".
• Removing quotes may allow a broader search: (((((((( internationale contre opposition ) OR ( internationale politiek opposition ))) OR ( internationale de l'opposition ))) OR ( internationale de opposition ))) OR ( internationale des propositions ))*.