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