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