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

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