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), "de internationaal verdragie prize" (Expand Search), "de internationaal meetingie prize" (Expand Search), "de internationale seminarie prize" (Expand Search), "_ international seminarie prize" (Expand Search)
"het internationaal seminar prize" » "het international seminar prize" (Expand Search), "het internationaal verdrag prize" (Expand Search), "het internationaal meeting 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 internationaal seminarie prize\"))~".
• Removing quotes may allow a broader search: (( het internationaal seminar prize ) OR ( de internationaal seminarie prize ))~.
• Adding a wildcard symbol may retrieve word variants: (("het internationaal seminar prize") OR ("de internationaal seminarie prize"))*.