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