Perhaps you should try some spelling variations:
"acs symposium series" » "acs symposium semi", "acs symposium sas", "acs symposium spire", "das symposium series", "lakes symposium series", "games symposium series"
"backs symposium sams" » "spaces symposium sams", "lakes symposium sams", "bibos symposium sams", "backs symposium sas", "backs symposium rams", "backs symposium ams"
"backs symposium sss" » "spaces symposium sss", "lakes symposium sss", "bibos symposium sss", "backs symposium sas"
"bacus symposium sams" » "bacus symposium sas", "bacus symposium rams", "bacus symposium ams"

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 series") OR ((("backs symposium sams") OR ("bacus symposium sams"))))) OR ("backs symposium sss")).
• Removing quotes may allow a broader search: (((( acs symposium series ) or ((( backs symposium sams ) or ( bacus symposium sams ))))) or ( backs symposium sss )).
• Adding a wildcard symbol may retrieve word variants: (((("acs symposium series") or ((("backs symposium sams") or ("bacus symposium sams"))))) or ("backs symposium sss"))*.