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