Perhaps you should try some spelling variations:
"abacus symposium series" » "aaas symposium series", "spaces symposium series", "lakes symposium series", "abacus symposium sas", "abacus symposium sss", "abacus symposium spire"
"abacus symposium semi" » "aaas symposium semi", "spaces symposium semi", "lakes symposium semi", "abacus symposium sas", "abacus symposium sss", "abacus symposium sagt"
"acs symposium series" » "acs symposium sas", "acs symposium sss", "acs symposium spire", "das symposium series", "lakes symposium series", "games symposium series"
"bacus symposium series" » "bacus symposium sas", "bacus symposium sss", "bacus symposium spire"

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: (((("abacus symposium series") OR ("abacus symposium semi"))) OR ((("acs symposium series") OR ("bacus symposium series"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"abacus symposium series\") OR (\"abacus symposium semi\"))) or (((\"acs symposium series\") or (\"bacus symposium series\"))))*".
• Removing quotes may allow a broader search: (((( abacus symposium series ) OR ( abacus symposium semi ))) or ((( acs symposium series ) or ( bacus symposium series ))))*.