Perhaps you should try some spelling variations:
"aaas symposium series" » "aaas symposium sas", "aaas symposium spire", "aaas symposium ssbse", "das symposium series", "cas symposium series", "gras symposium series"
"abacus symposium sss" » "bacus symposium sss", "spaces symposium sss", "lakes symposium sss", "abacus symposium sas"
"acs symposium semi" » "acs symposium sas", "acs symposium sagt", "bacus symposium semi", "das symposium semi", "lakes symposium semi"

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 ((("abacus symposium sss") OR ("acs symposium semi"))))*.
• Removing quotes may allow a broader search: (( aaas symposium series ) or ((( abacus symposium sss ) or ( acs symposium semi ))))*.