Perhaps you should try some spelling variations:
"lakes symposium ismis" » "lakes symposium isaac", "lakes symposium isvc", "lakes symposium ivsmis", "lakes symposium isvcsmis"
"das symposium sieds" » "das symposium series", "das symposium sas", "das symposium sss", "das symposion sieds", "texas symposium sieds", "npss symposium sieds"
"acs symposium ii" » "games symposium ii", "gauss symposium ii", "chaos symposium ii", "acs symposium iv", "acs symposium isvc", "acs symposium ieee", "acs symposium ivi", "acs symposium isvci"
"bacus symposium i" » "bacus symposium iv", "bacus symposium isvc", "abacus symposium i", "backs symposium i", "baus symposium i"

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: "((((\"bacus symposium i\") OR (((\"acs symposium ii\") OR (\"lakes symposium ismis\"))))) OR (\"das symposium sieds\"))".
• Removing quotes may allow a broader search: (((( bacus symposium i ) OR ((( acs symposium ii ) OR ( lakes symposium ismis ))))) OR ( das symposium sieds )).
• Adding a wildcard symbol may retrieve word variants: (((("bacus symposium i") OR ((("acs symposium ii") OR ("lakes symposium ismis"))))) OR ("das symposium sieds"))*.