Perhaps you should try some spelling variations:
"de internationale seminar prize" » "de international seminar prize" (Expand Search), "de internationaal seminarie prize" (Expand Search), "de internationale meeting prize" (Expand Search), "_ international seminar prize" (Expand Search)
"en internationale te parijs" » "_ international te parijs" (Expand Search), "het internationaal te parijs" (Expand Search), "eerste internationale te parijs" (Expand Search), "en internationale de parijs" (Expand Search), "en internationale des parijs" (Expand Search), "en internationales de parijs" (Expand Search), "en internationale de paris" (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 te parijs\") OR (\"de internationale seminar prize\"))~".
• Removing quotes may allow a broader search: (( en internationale te parijs ) OR ( de internationale seminar prize ))~.
• Adding a wildcard symbol may retrieve word variants: (("en internationale te parijs") OR ("de internationale seminar prize"))*.