Perhaps you should try some spelling variations:
"acs symposium semi" » "acs symposium sas", "acs symposium sss", "acs symposium sagt", "lakes symposium semi", "games symposium semi", "gauss symposium semi"
"das symposium ii" » "das symposion ii", "texas symposium ii", "lakes symposium ii", "das symposium i", "das symposium ismis", "das symposium ieee"
"acs symposium isaac" » "lakes symposium isaac", "games symposium isaac", "gauss symposium isaac"

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