Perhaps you should try some spelling variations:
"backs symposium series" » "backs symposium sss", "backs symposium spire", "backs symposium ssbse", "acs symposium series", "lakes symposium series", "bibos symposium series"
"spaces symposium semi" » "sources symposium semi", "spanish symposium semi", "lakes symposium semi", "spaces symposium sss", "spaces symposium sagt"
"backs symposium sas" » "acs symposium sas", "lakes symposium sas", "bibos symposium sas", "backs symposium sans", "backs symposium sams"
"bacus symposium semi" » "bacus symposium sss", "bacus symposium sagt"

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