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