Perhaps you should try some spelling variations:
"acta slavica estonian" » "acta latvian estonian", "acta place estonian", "anna slavina estonian", "art slavic estonian", "et slavica estonian"
"res slavica estonian" » "res latvian estonian", "res place estonian", "et slavica 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 ("res slavica estonian")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"acta slavica estonian\") OR (\"acta latvia estonia\"))) or (\"res slavica estonian\"))".
• Removing quotes may allow a broader search: (((( acta slavica estonian ) OR ( acta latvia estonia ))) or ( res slavica estonian )).
• Adding a wildcard symbol may retrieve word variants: (((("acta slavica estonian") OR ("acta latvia estonia"))) or ("res slavica estonian"))*.