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