Perhaps you should try some spelling variations:
"acta slavica estonian" » "acta place estonian", "anna slavina estonian", "art slavic estonian", "et slavica estonian"
"1 latvian estonian" » "1 latvian social", "10 latvian estonian", "_ latvian estonian", "1 latvia estonian"
"et latvia estonia" » "_ latvia estonia", "et latina estonia", "1 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 ((("1 latvian estonian") OR ("et latvia estonia")))).
• Removing quotes may allow a broader search: (( acta slavica estonian ) or ((( 1 latvian estonian ) or ( et latvia estonia )))).
• Adding a wildcard symbol may retrieve word variants: (("acta slavica estonian") or ((("1 latvian estonian") or ("et latvia estonia"))))*.