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

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