Perhaps you should try some spelling variations:
abacus symposium » bacus symposium, aaas symposium, spaces symposium
symposium series » symposium semi, symposium sas, symposium sss
acs symposium » bacus symposium, lakes symposium, games symposium
das symposium » das symposion, bacus symposium, texas symposium

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: (( abacus symposium series ) OR ((( acs symposium series ) OR ( das symposium series )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( abacus symposium series ) or ((( acs symposium series ) OR ( das symposium series ))))".
• Adding a wildcard symbol may retrieve word variants: (( abacus symposium series ) or ((( acs symposium series ) OR ( das symposium series ))))*.