Perhaps you should try some spelling variations:
"acta slavica estonian" » "acta place estonian", "anna slavina estonian", "art slavic estonian", "et slavica estonian"
"acta latvian estonian" » "acta latvian social", "suna latvian estonian"
"toth latvian estonian" » "toth latvian social", "youth latvia estonian", "youth latvian estonian"
"toth latvia estonia" » "youth latvia estonia"

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 latvian estonian") OR ("toth latvian estonian"))) OR ("toth latvia estonia")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"acta slavica estonian\") or (((((\"acta latvian estonian\") OR (\"toth latvian estonian\"))) or (\"toth latvia estonia\"))))".
• Removing quotes may allow a broader search: (( acta slavica estonian ) or ((((( acta latvian estonian ) OR ( toth latvian estonian ))) or ( toth latvia estonia )))).
• Adding a wildcard symbol may retrieve word variants: (("acta slavica estonian") or ((((("acta latvian estonian") OR ("toth latvian estonian"))) or ("toth latvia estonia"))))*.