Perhaps you should try some spelling variations:
"halen internationale seminar prize" » "halen international seminar prize" (Expand Search), "halen internationaal seminarie prize" (Expand Search), "halen internationale mars prize" (Expand Search), "en internationale seminar prize" (Expand Search), "een internationale seminar prize" (Expand Search), "et internationale seminar prize" (Expand Search)
"de internationale meeting prize" » "de international meeting prize" (Expand Search), "de internationale samenwerking prize" (Expand Search), "_ international meeting 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: (("halen internationale seminar prize") OR ("de internationale meeting prize"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"halen internationale seminar prize\") OR (\"de internationale meeting prize\"))".
• Removing quotes may allow a broader search: (( halen internationale seminar prize ) OR ( de internationale meeting prize )).
• Adding a wildcard symbol may retrieve word variants: (("halen internationale seminar prize") OR ("de internationale meeting prize"))*.