Perhaps you should try some spelling variations:
"spaces symposium semi" » "sources symposium semi", "spanish symposium semi", "bacus symposium semi", "spaces symposium sss", "spaces symposium sagt"
"spaces symposium sas" » "sources symposium sas", "spanish symposium sas", "bacus symposium sas", "spaces symposium sans", "spaces symposium sams"
"acs symposium series" » "acs symposium sss", "acs symposium spire", "acs symposium ssbse", "bacus symposium series", "das symposium series", "lakes symposium series"

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