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

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