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