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