Perhaps you should try some spelling variations:
"spaces symposium sams" » "sources symposium sams", "spanish symposium sams", "lakes symposium sams", "spaces symposium sas", "spaces symposium rams", "spaces symposium ams"
"backs symposium series" » "backs symposium semi", "backs symposium sas", "backs symposium sss", "acs symposium series", "lakes symposium series", "bibos symposium series"
"backs symposium sams" » "acs symposium sams", "lakes symposium sams", "bibos symposium sams", "backs symposium sas", "backs symposium rams", "backs symposium ams"
"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: (("backs symposium series") OR ((((("backs symposium sams") OR ("spaces symposium sams"))) OR ("bacus symposium sams")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"backs symposium series\") or (((((\"backs symposium sams\") OR (\"spaces symposium sams\"))) or (\"bacus symposium sams\"))))".
• Removing quotes may allow a broader search: (( backs symposium series ) or ((((( backs symposium sams ) OR ( spaces symposium sams ))) or ( bacus symposium sams )))).
• Adding a wildcard symbol may retrieve word variants: (("backs symposium series") or ((((("backs symposium sams") OR ("spaces symposium sams"))) or ("bacus symposium sams"))))*.