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