Perhaps you should try some spelling variations:
"das symposium series" » "das symposium semi", "das symposium spire", "das symposium ssbse", "das symposion series", "texas symposium series", "lakes symposium series"
"acs symposium sieds" » "acs symposium semi", "acs symposium ssd", "acs symposium sstd", "lakes symposium sieds", "games symposium sieds", "gauss symposium sieds"
"bacus symposium irs" » "bacus symposium i", "bacus symposium ii", "bacus symposium iii", "abacus symposium irs", "backs symposium irs", "baus symposium irs"
"acs symposium iv" » "lakes symposium iv", "games symposium iv", "gauss symposium iv", "acs symposium isvc"
"das symposium sas" » "das symposion sas", "texas symposium sas", "lakes symposium sas", "das symposium sans", "das symposium sams"
"das symposium sss" » "das symposion sss", "texas symposium sss", "lakes symposium sss"

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: (((("bacus symposium irs") OR ("acs symposium iv"))) OR ((("acs symposium sieds") OR ((((("das symposium series") OR ("das symposium sas"))) OR ("das symposium sss")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"bacus symposium irs\") or (\"acs symposium iv\"))) or (((\"acs symposium sieds\") or (((((\"das symposium series\") OR (\"das symposium sas\"))) or (\"das symposium sss\"))))))".
• Removing quotes may allow a broader search: (((( bacus symposium irs ) or ( acs symposium iv ))) or ((( acs symposium sieds ) or ((((( das symposium series ) OR ( das symposium sas ))) or ( das symposium sss )))))).
• Adding a wildcard symbol may retrieve word variants: (((("bacus symposium irs") or ("acs symposium iv"))) or ((("acs symposium sieds") or ((((("das symposium series") OR ("das symposium sas"))) or ("das symposium sss"))))))*.