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