Perhaps you should try some spelling variations:
"aaas symposium series" » "aaas symposium semi", "aaas symposium sas", "aaas symposium sss", "das symposium series", "gras symposium series", "iass symposium series"
"cas symposium series" » "cas symposium semi", "cas symposium sas", "cas symposium sss", "das symposium series", "chaos symposium series", "cles symposium series"
"acs symposium series" » "acs symposium semi", "acs symposium sas", "acs symposium sss", "bacus symposium series", "das symposium series", "lakes symposium series"

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 ("cas symposium series"))) OR ("acs symposium series"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"aaas symposium series\") OR (\"cas symposium series\"))) or (\"acs symposium series\"))*".
• Removing quotes may allow a broader search: (((( aaas symposium series ) OR ( cas symposium series ))) or ( acs symposium series ))*.