Perhaps you should try some spelling variations:
"acs symposium series" » "acs symposium sss", "acs symposium spire", "acs symposium ssbse", "das symposium series", "games symposium series", "gauss symposium series"
"acs symposium semi" » "acs symposium sss", "acs symposium sagt", "das symposium semi", "games symposium semi", "gauss symposium semi"
"lakes symposium semi" » "lakes symposium sss", "lakes symposium sagt"
"bacus symposium sas" » "abacus symposium sas", "backs symposium sas", "baus symposium sas", "bacus symposium sans", "bacus symposium sams"

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