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

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 semi") OR ("lakes symposium semi")))).
• Removing quotes may allow a broader search: (( aaas symposium series ) or ((( abacus symposium semi ) or ( lakes symposium semi )))).
• Adding a wildcard symbol may retrieve word variants: (("aaas symposium series") or ((("abacus symposium semi") or ("lakes symposium semi"))))*.