Perhaps you should try some spelling variations:
"acs symposium series" » "acs symposium semi", "acs symposium sas", "acs symposium spire", "das symposium series", "lakes symposium series", "games symposium series"
"bacus symposium sss" » "bacus symposium sas", "abacus symposium sss", "backs symposium sss", "baus symposium sss"

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: (("bacus symposium sss") OR ("acs symposium series")).
• Removing quotes may allow a broader search: (( bacus symposium sss ) or ( acs symposium series )).
• Adding a wildcard symbol may retrieve word variants: (("bacus symposium sss") or ("acs symposium series"))*.