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