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 des prince" » "de internationale des prince" (Expand Search), "_ international des prince" (Expand Search), "het internationaal des prince" (Expand Search), "en internationale de prince" (Expand Search), "en internationale le prince" (Expand Search), "en internationale des principes" (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 des prince\") OR (\"het international seminar prize\"))~".
• Removing quotes may allow a broader search: (( en internationale des prince ) OR ( het international seminar prize ))~.
• Adding a wildcard symbol may retrieve word variants: (("en internationale des prince") OR ("het international seminar prize"))*.