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", "iass symposium series"
"gras symposium series" » "gras symposium sas", "gras symposium sss", "gras symposium spire", "brass symposium series", "das symposium series", "cas symposium series"
"lakes symposium semi" » "bacus symposium semi", "lakes symposium sas", "lakes symposium sss", "lakes symposium sagt"
"acs symposium semi" » "acs symposium sas", "acs symposium sss", "acs symposium sagt", "bacus symposium semi", "das symposium semi", "games 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 ("gras symposium series"))) OR ((("lakes symposium semi") OR ("acs symposium semi")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"aaas symposium series\") OR (\"gras symposium series\"))) or (((\"lakes symposium semi\") or (\"acs symposium semi\"))))".
• Removing quotes may allow a broader search: (((( aaas symposium series ) OR ( gras symposium series ))) or ((( lakes symposium semi ) or ( acs symposium semi )))).
• Adding a wildcard symbol may retrieve word variants: (((("aaas symposium series") OR ("gras symposium series"))) or ((("lakes symposium semi") or ("acs symposium semi"))))*.