Perhaps you should try some spelling variations:
symposium series » symposium semi, symposium sas, symposium spire
aaas symposium » das symposium, cas symposium, gras symposium
symposium sss » symposium sas
acs symposium » bacus symposium, das symposium, lakes 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: (((( aaas symposium series ) OR ( aaas symposium sss ))) OR ( acs symposium series )).
• Adding a wildcard symbol may retrieve word variants: (((( aaas symposium series ) or ( aaas symposium sss ))) or ( acs symposium series ))*.