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