Perhaps you should try some spelling variations:
"das symposium series" » "das symposium sas", "das symposium spire", "das symposium ssbse", "das symposion series", "texas symposium series", "npss symposium series"
"acs symposium semi" » "acs symposium sas", "acs symposium sagt", "games symposium semi", "gauss symposium semi", "chaos symposium semi"
"lakes symposium semi" » "lakes symposium sas", "lakes symposium sagt"
"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"

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