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

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