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

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: (((("backs symposium iv") OR ((("das symposium ii") OR ("acs symposium ismis"))))) OR ("games symposium semi")).
• Removing quotes may allow a broader search: (((( backs symposium iv ) or ((( das symposium ii ) or ( acs symposium ismis ))))) or ( games symposium semi )).
• Adding a wildcard symbol may retrieve word variants: (((("backs symposium iv") or ((("das symposium ii") or ("acs symposium ismis"))))) or ("games symposium semi"))*.