Perhaps you should try some spelling variations:
"bacus symposium series" » "bacus symposium semi", "bacus symposium sss", "bacus symposium spire"
"acs symposium iws" » "lakes symposium iws", "games symposium iws", "gauss symposium iws", "acs symposium irs", "acs symposium ius", "acs symposium irps"
"das symposium sas" » "das symposion sas", "texas symposium sas", "lakes symposium sas", "das symposium sans", "das symposium sams"

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: "((\"acs symposium iws\") OR (((\"das symposium sas\") OR (\"bacus symposium series\"))))".
• Removing quotes may allow a broader search: (( acs symposium iws ) OR ((( das symposium sas ) OR ( bacus symposium series )))).
• Adding a wildcard symbol may retrieve word variants: (("acs symposium iws") OR ((("das symposium sas") OR ("bacus symposium series"))))*.