Perhaps you should try some spelling variations:
"internationale conferentie opposition" » "international conference opposition" (Expand Search)
"internationale des opposition" » "internationale d'ete opposition" (Expand Search)
"international des opposition" » "international d'ete opposition" (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 ((("international des opposition") OR ("international des propositions"))))) OR ((("internationale conferentie 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 (((\"international des opposition\") OR (\"international des propositions\"))))) OR (((\"internationale conferentie opposition\") OR (((\"international de opposition\") OR (\"internationale de l'opposition\"))))))".
• Removing quotes may allow a broader search: (((( internationale des opposition ) OR ((( international des opposition ) OR ( international des propositions ))))) OR ((( internationale conferentie opposition ) OR ((( international de opposition ) OR ( internationale de l'opposition )))))).
• Adding a wildcard symbol may retrieve word variants: (((("internationale des opposition") OR ((("international des opposition") OR ("international des propositions"))))) OR ((("internationale conferentie opposition") OR ((("international de opposition") OR ("internationale de l'opposition"))))))*.