Perhaps you should try some spelling variations:
symposium series » symposium sss, symposium spire, symposium ssbse
symposium semi » symposium sss, symposium sagt
bacus » abacus, backs, baus
sas » sans, sams

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