Perhaps you should try some spelling variations:
"acs symposium series" » "acs symposium semi", "acs symposium sss", "acs symposium spire", "bacus symposium series", "das symposium series", "lakes symposium series"
"aaas symposium sas" » "das symposium sas", "cas symposium sas", "gras symposium sas", "aaas symposium sams"
"aaas symposium sans" » "das symposium sans", "cas symposium sans", "gras symposium sans", "aaas symposium san", "aaas symposium ans", "aaas symposium plans"
"texas symposium sas" » "texas symposium sams", "texts 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: (((((("aaas symposium sas") OR ("aaas symposium sans"))) OR ("texas symposium sas"))) OR ("acs symposium series")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"aaas symposium sas\") OR (\"aaas symposium sans\"))) or (\"texas symposium sas\"))) or (\"acs symposium series\"))".
• Removing quotes may allow a broader search: (((((( aaas symposium sas ) OR ( aaas symposium sans ))) or ( texas symposium sas ))) or ( acs symposium series )).
• Adding a wildcard symbol may retrieve word variants: (((((("aaas symposium sas") OR ("aaas symposium sans"))) or ("texas symposium sas"))) or ("acs symposium series"))*.