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