Perhaps you should try some spelling variations:
"price minister of Czechoslovakia" » "prince minister of Czechoslovakia", "prime ministers of Czechoslovakia", "pirie minister of Czechoslovakia"
"prime minister of Czechoslovakia" » "primer minister of Czechoslovakia", "crime minister of Czechoslovakia"

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: "((\"prime minister of Czechoslovakia\") OR (\"price minister of Czechoslovakia\"))".
• Removing quotes may allow a broader search: (( prime minister of Czechoslovakia ) OR ( price minister of Czechoslovakia )).
• Adding a wildcard symbol may retrieve word variants: (("prime minister of Czechoslovakia") OR ("price minister of Czechoslovakia"))*.