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

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