Perhaps you should try some spelling variations:
"en internationaal seminarie prize" » "en international seminar prize" (Expand Search), "en international solidarity prize" (Expand Search), "het internationaal seminarie prize" (Expand Search), "en internationale seminarie prize" (Expand Search), "een internationale seminarie prize" (Expand Search)
"de internationale seminarie prize" » "de international seminar prize" (Expand Search), "de international solidarity prize" (Expand Search), "de internationale contre prize" (Expand Search), "_ international seminarie prize" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"en internationaal seminarie prize\") OR (\"de internationale seminarie prize\"))~".
• Removing quotes may allow a broader search: (( en internationaal seminarie prize ) OR ( de internationale seminarie prize ))~.
• Adding a wildcard symbol may retrieve word variants: (("en internationaal seminarie prize") OR ("de internationale seminarie prize"))*.