Perhaps you should try some spelling variations:
"acta slavica estonian" » "acta latvia estonia", "acta place estonian", "anna slavina estonian", "art slavic estonian", "et slavica estonian"
"acta latvian estonian" » "acta latvia estonia", "acta latvian social", "suna latvian estonian", "toth latvian estonian"

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: "((\"acta slavica estonian\") OR (\"acta latvian estonian\"))".
• Removing quotes may allow a broader search: (( acta slavica estonian ) OR ( acta latvian estonian )).
• Adding a wildcard symbol may retrieve word variants: (("acta slavica estonian") OR ("acta latvian estonian"))*.