Perhaps you should try some spelling variations:
"acta latvian estonian" » "acta latvia estonia", "acta latvian social", "suna latvian estonian"
"toth latvian estonian" » "toth latvia estonia", "toth latvian social", "youth latvia estonian"
"art slavic estonian" » "east slavic estonian", "art static estonian", "balto slavic estonian"

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