Perhaps you should try some spelling variations:
"acta slavica estonian" » "acta latvia estonia", "acta latvian estonian", "anna slavina estonian", "art slavic estonian", "et slavica estonian"
"acta place estonian" » "acta place estonia", "acta large estonian", "acta elite estonian", "data place estonian", "action place estonian"
"area place estonian" » "area place estonia", "area large estonian", "area elite estonian", "area plans estonian", "area space estonian", "area black estonian"

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