Perhaps you should try some spelling variations:
"aaas symposium series" » "aaas symposium sas", "aaas symposium sss", "aaas symposium spire", "das symposium series", "cas symposium series", "gras symposium series"
"abacus symposium semi" » "bacus symposium semi", "spaces symposium semi", "lakes symposium semi", "abacus symposium sas", "abacus symposium sss", "abacus symposium sagt"
"acs symposium semi" » "acs symposium sas", "acs symposium sss", "acs symposium sagt", "bacus symposium semi", "das symposium semi", "lakes symposium semi"

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