Perhaps you should try some spelling variations:
"acs symposium series" » "acs symposium semi", "acs symposium sas", "acs symposium sss", "bacus symposium series", "das symposium series", "lakes symposium series"
"acs symposium irs" » "bacus symposium irs", "das symposium irs", "lakes symposium irs", "acs symposium i", "acs symposium ii", "acs symposium ida"
"acs symposium iii" » "bacus symposium iii", "das symposium iii", "lakes symposium iii", "acs symposium ii", "acs symposium i", "acs symposium ismis"
"acs symposium iv" » "bacus symposium iv", "das symposium iv", "lakes symposium iv", "acs symposium isvc"

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 irs") OR ("acs symposium iii"))) OR ("acs symposium iv"))) OR ("acs symposium series"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"acs symposium irs\") OR (\"acs symposium iii\"))) or (\"acs symposium iv\"))) or (\"acs symposium series\"))*".
• Removing quotes may allow a broader search: (((((( acs symposium irs ) OR ( acs symposium iii ))) or ( acs symposium iv ))) or ( acs symposium series ))*.