Perhaps you should try some spelling variations:
"its original conference" » "its regional conference", "its retinal conference", "its regional conferences", "his original conference"
"its origin conference" » "its oregon conference", "its iranian conference", "its african conference"
"la regional differences" » "a regional differences", "ia regional differences", "sea regional differences"

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 regional differences") OR ((("its original conference") OR ("its origin conference"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"la regional differences\") or (((\"its original conference\") OR (\"its origin conference\"))))*".
• Removing quotes may allow a broader search: (( la regional differences ) or ((( its original conference ) OR ( its origin conference ))))*.