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" » "et latvia estonia", "et place estonian", "res slavica estonian", "_ slavica estonian"
"acta latvian estonian" » "acta latvia estonia", "suna latvian estonian", "toth latvian estonian"
"acta latvian social" » "acta latvia's social", "acta asian social", "acta adrian social", "suna latvian social", "toth latvian social"

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 ("et slavica estonian"))) OR ((("acta latvian estonian") OR ("acta latvian social")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"acta slavica estonian\") or (\"et slavica estonian\"))) or (((\"acta latvian estonian\") OR (\"acta latvian social\"))))".
• Removing quotes may allow a broader search: (((( acta slavica estonian ) or ( et slavica estonian ))) or ((( acta latvian estonian ) OR ( acta latvian social )))).
• Adding a wildcard symbol may retrieve word variants: (((("acta slavica estonian") or ("et slavica estonian"))) or ((("acta latvian estonian") OR ("acta latvian social"))))*.