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)
"en internationale seminar prize" » "en international seminar prize" (Expand Search), "en internationale meeting prize" (Expand Search), "en internationale mars prize" (Expand Search), "de internationale seminar prize" (Expand Search), "_ international seminar prize" (Expand Search), "het internationaal seminar prize" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("en internationale seminar prize") OR ("_ internationaal seminarie prize"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"en internationale seminar prize\") OR (\"_ internationaal seminarie prize\"))*".
• Removing quotes may allow a broader search: (( en internationale seminar prize ) OR ( _ internationaal seminarie prize ))*.