Perhaps you should try some spelling variations:
"la regional conferences" » "la regional conference", "la regional consequences", "la regional differences", "a regional conferences", "ia regional conferences", "sea regional conferences"
"la original conference" » "la regional conference", "la retinal conference", "la optical conference", "_ original conference", "2 original conference", "1 original conference", "l_ original conference", "l2 original conference", "l1 original conference"
"a original conference" » "a regional conference", "a retinal conference", "a optical conference", "_ original conference", "2 original conference", "1 original conference"
"das original conference" » "das regional conference", "das retinal conference", "das optical conference", "his original conference", "its original conference"

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: (((((("la original conference") OR ("a original conference"))) OR ("la regional conferences"))) OR ("das original conference")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"la original conference\") OR (\"a original conference\"))) or (\"la regional conferences\"))) or (\"das original conference\"))".
• Removing quotes may allow a broader search: (((((( la original conference ) OR ( a original conference ))) or ( la regional conferences ))) or ( das original conference )).
• Adding a wildcard symbol may retrieve word variants: (((((("la original conference") OR ("a original conference"))) or ("la regional conferences"))) or ("das original conference"))*.