Perhaps you should try some spelling variations:
"abacus symposium series" » "acs symposium series", "aaas symposium series", "lakes symposium series", "abacus symposium semi", "abacus symposium sas", "abacus symposium spire"
"bacus symposium series" » "bacus symposium semi", "bacus symposium sas", "bacus symposium spire"
"spaces symposium sss" » "sources symposium sss", "spanish symposium sss", "lakes symposium sss", "spaces symposium sas"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"abacus symposium series\") OR (\"spaces symposium sss\"))) OR (\"bacus symposium series\"))".
• Removing quotes may allow a broader search: (((( abacus symposium series ) OR ( spaces symposium sss ))) OR ( bacus symposium series )).
• Adding a wildcard symbol may retrieve word variants: (((("abacus symposium series") OR ("spaces symposium sss"))) OR ("bacus symposium series"))*.