Perhaps you should try some spelling variations:
"het international seminar prize" » "het international women's prize" (Expand Search), "het international solidarity prize" (Expand Search), "het internationaal seminar prize" (Expand Search), "de international seminar prize" (Expand Search), "et internationale seminar prize" (Expand Search)
"en internationale de prins" » "de internationale de prins" (Expand Search), "_ international de prins" (Expand Search), "het internationaal de prins" (Expand Search), "en internationale des prins" (Expand Search), "en international de prins" (Expand Search), "en internationale de prijs" (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 de prins\") OR (\"het international seminar prize\"))~".
• Removing quotes may allow a broader search: (( en internationale de prins ) OR ( het international seminar prize ))~.
• Adding a wildcard symbol may retrieve word variants: (("en internationale de prins") OR ("het international seminar prize"))*.