Perhaps you should try some spelling variations:
"acta slavica estonian" » "acta latvia estonia", "anna slavina estonian", "art slavic estonian", "et slavica estonian"
"songs latvian estonian" » "songs latvia estonia", "songs latin estonian", "among latvian estonian", "suna latvian estonian"
"acta place estonian" » "acta place estonia", "acta large estonian", "acta elite estonian", "area place estonian", "data place estonian", "action place estonian"
"acta latvian social" » "acta latvia's social", "acta asian social", "acta adrian social", "suna latvian social", "toth latvian social"

Try widening your search to All Fields.

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