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

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 ((( lakes symposium series ) OR ( das symposium sas )))).
• Adding a wildcard symbol may retrieve word variants: (( abacus symposium series ) or ((( lakes symposium series ) or ( das symposium sas ))))*.