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 prijs" » "_ international de prijs" (Expand Search), "de internationale de prijs" (Expand Search), "het international de prijs" (Expand Search), "het internationale de prijs" (Expand Search), "het internationale des prijs" (Expand Search), "het internationaal te parijs" (Expand Search), "het internationaal de paris" (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 prijs") OR ("een internationale seminar prize"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"het internationaal de prijs\") OR (\"een internationale seminar prize\"))*".
• Removing quotes may allow a broader search: (( het internationaal de prijs ) OR ( een internationale seminar prize ))*.