Perhaps you should try some spelling variations:
"acta slavica estonia" » "acta latvia estonia", "anna slavina estonia", "art slavic estonia"
"et slavica estonia" » "et latvia estonia", "res slavica estonia", "_ slavica estonia"
"acta slovenia estonia" » "malta slovenia estonia", "area slovenia estonia", "art slovenia estonia"

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