Perhaps you should try some spelling variations:
"das symposium sieds" » "das symposium series", "das symposium sss", "das symposium semi", "das symposion sieds", "texas symposium sieds", "npss symposium sieds"
"lakes symposium sieds" » "lakes symposium series", "lakes symposium sss", "lakes symposium semi"
"acs symposium ies" » "games symposium ies", "gauss symposium ies", "chaos 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 ("lakes symposium sieds"))) OR ("bacus symposium sas")))).
• Removing quotes may allow a broader search: (( acs symposium ies ) or ((((( das symposium sieds ) or ( lakes symposium sieds ))) or ( bacus symposium sas )))).
• Adding a wildcard symbol may retrieve word variants: (("acs symposium ies") or ((((("das symposium sieds") or ("lakes symposium sieds"))) or ("bacus symposium sas"))))*.