Perhaps you should try some spelling variations:
"acs symposium iv" » "das symposium iv", "lakes symposium iv", "games symposium iv", "acs symposium isvc"
"das symposion sas" » "das symposium sas", "das symposion am", "das symposion des"
"bacus symposium iv" » "bacus symposium isvc"

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