Perhaps you should try some spelling variations:
"das symposium series" » "das symposium sas", "das symposium sss", "das symposium spire", "das symposion series", "texas symposium series", "lakes symposium series"
"acs symposium sieds" » "acs symposium sas", "acs symposium sss", "acs symposium ssd", "lakes symposium sieds", "games symposium sieds", "gauss symposium sieds"
"backs symposium irs" » "spaces symposium irs", "lakes symposium irs", "bibos symposium irs", "backs symposium iv", "backs symposium i", "backs symposium iii"
"das symposium semi" » "das symposium sas", "das symposium sss", "das symposium sagt", "das symposion semi", "texas symposium semi", "lakes symposium semi"
"acs symposium ii" » "lakes symposium ii", "games symposium ii", "gauss symposium ii", "acs symposium iv", "acs symposium i", "acs symposium ismis"
"bacus symposium ii" » "bacus symposium iv", "bacus symposium i", "bacus 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: (((("backs symposium irs") OR ((("acs symposium ii") OR ("bacus symposium ii"))))) OR ((("acs symposium sieds") OR ((("das symposium series") OR ("das symposium semi")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"backs symposium irs\") or (((\"acs symposium ii\") or (\"bacus symposium ii\"))))) or (((\"acs symposium sieds\") or (((\"das symposium series\") OR (\"das symposium semi\"))))))".
• Removing quotes may allow a broader search: (((( backs symposium irs ) or ((( acs symposium ii ) or ( bacus symposium ii ))))) or ((( acs symposium sieds ) or ((( das symposium series ) OR ( das symposium semi )))))).
• Adding a wildcard symbol may retrieve word variants: (((("backs symposium irs") or ((("acs symposium ii") or ("bacus symposium ii"))))) or ((("acs symposium sieds") or ((("das symposium series") OR ("das symposium semi"))))))*.