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

You may be able to get more results by adjusting your search query.

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