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