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