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

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("acta slavica estonian") OR ("balto slavic estonian")).
• Removing quotes may allow a broader search: (( acta slavica estonian ) or ( balto slavic estonian )).
• Adding a wildcard symbol may retrieve word variants: (("acta slavica estonian") or ("balto slavic estonian"))*.