Perhaps you should try some spelling variations:
"das symposium sieds" » "das symposium series", "das symposium sas", "das symposium sss", "das symposion sieds", "texas symposium sieds", "npss symposium sieds"
"bacus symposium sieds" » "bacus symposium series", "bacus symposium sas", "bacus symposium sss"
"acs symposium ies" » "games symposium ies", "gauss symposium ies", "chaos symposium ies", "acs symposium irs", "acs symposium ius", "acs symposium iws"
"lakes symposium ies" » "lakes symposium irs", "lakes symposium ius", "lakes symposium iws"

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