Perhaps you should try some spelling variations:
"das symposium isaac" » "das symposion isaac", "texas symposium isaac", "npss symposium isaac", "das symposium ivsaac", "das symposium isvcsaac"
"acs symposium sss" » "games symposium sss", "gauss symposium sss", "chaos symposium sss", "acs symposium sas"
"lakes symposium ii" » "lakes symposium iv", "lakes symposium ismis", "lakes symposium isvc", "lakes symposium ivi", "lakes symposium isvci"
"bacus symposium i" » "bacus symposium iv", "bacus symposium isvc", "abacus symposium i", "backs symposium i", "baus symposium i"

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