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