Perhaps you should try some spelling variations:
"een internationale seminar prize" » "een international seminar prize" (Expand Search), "een internationaal seminarie prize" (Expand Search), "een internationale meeting prize" (Expand Search), "en internationale seminar prize" (Expand Search), "de internationale seminar prize" (Expand Search), "de international seminar prize" (Expand Search)
"het internationaal de prize" » "_ international de prize" (Expand Search), "de internationale de prize" (Expand Search), "het international de prize" (Expand Search), "het internationale de prize" (Expand Search), "het internationale des prize" (Expand Search), "het internationaal de prijzen" (Expand Search), "het internationaal de prince" (Expand Search), "het internationaal de prijs" (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: (("het internationaal de prize") OR ("een internationale seminar prize"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"het internationaal de prize\") OR (\"een internationale seminar prize\"))*".
• Removing quotes may allow a broader search: (( het internationaal de prize ) OR ( een internationale seminar prize ))*.