Perhaps you should try some spelling variations:
"texas symposium series" » "texas symposium semi", "texas symposium sas", "texas symposium spire", "texts symposium series"
"das symposium sss" » "bacus symposium sss", "lakes symposium sss", "npss symposium sss", "das symposium sas"
"das symposion sss" » "das symposion des", "das symposion aus", "das symposion als"

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: (("texas symposium series") OR ((("das symposium sss") OR ("das symposion sss")))).
• Removing quotes may allow a broader search: (( texas symposium series ) or ((( das symposium sss ) or ( das symposion sss )))).
• Adding a wildcard symbol may retrieve word variants: (("texas symposium series") or ((("das symposium sss") or ("das symposion sss"))))*.