Perhaps you should try some spelling variations:
"lakes symposium series" » "lakes symposium semi", "lakes symposium sas", "lakes symposium sss"
"bacus symposium series" » "bacus symposium semi", "bacus symposium sas", "bacus symposium sss"
"acs symposium iv" » "das symposium iv", "games symposium iv", "gauss symposium iv", "acs symposium isvc"

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