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

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