Perhaps you should try some spelling variations:
"abacus symposium series" » "acs symposium series", "aaas symposium series", "spaces symposium series", "abacus symposium semi", "abacus symposium sas", "abacus symposium sss"
"bacus symposium series" » "bacus symposium semi", "bacus symposium sas", "bacus symposium sss"
"games symposium series" » "games symposium semi", "games symposium sas", "games symposium sss", "lakes symposium series", "gauss symposium series", "das 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: (((("abacus symposium series") OR ("bacus symposium series"))) OR ("games symposium series"))*.
• Removing quotes may allow a broader search: (((( abacus symposium series ) or ( bacus symposium series ))) or ( games symposium series ))*.