Perhaps you should try some spelling variations:
"das symposium series" » "das symposium semi", "das symposium sss", "das symposium spire", "das symposion series", "bacus symposium series", "texas symposium series"
"backs symposium irs" » "bacus symposium irs", "spaces symposium irs", "lakes symposium irs", "backs symposium iv", "backs symposium ii", "backs symposium iii", "backs symposium ivrs", "backs symposium isvcrs"
"acs symposium i" » "bacus symposium i", "lakes symposium i", "games symposium i", "acs symposium iv", "acs symposium isvc"
"acs symposium sas" » "bacus symposium sas", "lakes symposium sas", "games symposium sas", "acs symposium sans", "acs symposium sams"

Try widening your search to All Fields.

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: (((("backs symposium irs") OR ("acs symposium i"))) OR ((("acs symposium sas") OR ("das symposium series")))).
• Removing quotes may allow a broader search: (((( backs symposium irs ) or ( acs symposium i ))) or ((( acs symposium sas ) or ( das symposium series )))).
• Adding a wildcard symbol may retrieve word variants: (((("backs symposium irs") or ("acs symposium i"))) or ((("acs symposium sas") or ("das symposium series"))))*.