Perhaps you should try some spelling variations:
"abacus symposium series" » "bacus symposium series", "acs symposium series", "aaas symposium series", "abacus symposium spire", "abacus symposium ssbse"
"abacus symposium sas" » "bacus symposium sas", "acs symposium sas", "aaas symposium sas", "abacus symposium sans", "abacus symposium sams"
"das symposium semi" » "das symposium sagt", "das symposion semi", "bacus symposium semi", "texas symposium semi"
"das symposium sss" » "das symposion sss", "bacus symposium sss", "texas 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: (("abacus symposium series") OR ((((("das symposium semi") OR ("das symposium sss"))) OR ("abacus symposium sas")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"abacus symposium series\") or (((((\"das symposium semi\") OR (\"das symposium sss\"))) or (\"abacus symposium sas\"))))".
• Removing quotes may allow a broader search: (( abacus symposium series ) or ((((( das symposium semi ) OR ( das symposium sss ))) or ( abacus symposium sas )))).
• Adding a wildcard symbol may retrieve word variants: (("abacus symposium series") or ((((("das symposium semi") OR ("das symposium sss"))) or ("abacus symposium sas"))))*.