Perhaps you should try some spelling variations:
"acta latvian estonian" » "acta latvian social", "toth latvian estonian", "haiti latvian estonian"
"suna latvian estonian" » "suna latvian social", "songs latvian estonian", "using latvian estonian"
"acta slavica estonian" » "acta place estonian", "anna slavina estonian", "art slavic estonian", "et slavica estonian"
"acta latvia estonia" » "haiti latvia 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 estonian") OR ("acta latvia estonia"))) OR ((("acta latvian estonian") OR ("suna latvian estonian")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"acta slavica estonian\") OR (\"acta latvia estonia\"))) or (((\"acta latvian estonian\") or (\"suna latvian estonian\"))))".
• Removing quotes may allow a broader search: (((( acta slavica estonian ) OR ( acta latvia estonia ))) or ((( acta latvian estonian ) or ( suna latvian estonian )))).
• Adding a wildcard symbol may retrieve word variants: (((("acta slavica estonian") OR ("acta latvia estonia"))) or ((("acta latvian estonian") or ("suna latvian estonian"))))*.