Perhaps you should try some spelling variations:
"de internationaal seminarie prize" » "de international seminar prize" (Expand Search), "de international solidarity prize" (Expand Search), "de international seminarie prize" (Expand Search), "het internationaal seminarie prize" (Expand Search), "de internationale seminarie prize" (Expand Search)
"en internationalee seminar prize" » "en international seminar prize" (Expand Search), "en internationale seminar prize" (Expand Search), "een internationale seminar prize" (Expand Search), "et internationale seminar 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 internationalee seminar prize\") OR (\"de internationaal seminarie prize\"))~".
• Removing quotes may allow a broader search: (( en internationalee seminar prize ) OR ( de internationaal seminarie prize ))~.
• Adding a wildcard symbol may retrieve word variants: (("en internationalee seminar prize") OR ("de internationaal seminarie prize"))*.