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