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