Perhaps you should try some spelling variations:
"en internationale seminar prize" » "en international seminar prize" (Expand Search), "en internationaal seminarie prize" (Expand Search), "en internationale meeting prize" (Expand Search), "de internationale seminar prize" (Expand Search), "_ international seminar prize" (Expand Search), "het internationaal seminar prize" (Expand Search)
"de international solidarity prize" » "de internationale solidarity prize" (Expand Search), "_ international solidarity prize" (Expand Search), "het internationaal solidarity prize" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"en internationale seminar prize\") OR (\"de international solidarity prize\"))~".
• Removing quotes may allow a broader search: (( en internationale seminar prize ) OR ( de international solidarity prize ))~.
• Adding a wildcard symbol may retrieve word variants: (("en internationale seminar prize") OR ("de international solidarity prize"))*.