Perhaps you should try some spelling variations:
"ACS symposium series" » "ACS symposium semi", "ACS symposium sas", "ACS symposium spire"
"acs symposium sieds" » "acs symposium sas", "acs symposium semi", "acs symposium ssd", "bacus symposium sieds", "das symposium sieds", "lakes symposium sieds"
"ACS symposium sss" » "ACS symposium sas"

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