Perhaps you should try some spelling variations:
europe conference » european conferences, euromicro conference
ofthe conference » oate conference, atthe conference, fifth conference
open conference » asian conference, european conferences
big ofthe » big often, big other
big open » big one, big ben

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((((\\"big open conference\\") or (\\"big ((europe conference) OR (european conference))\\"))) or (\\"big ofthe conference\\"))\"".
• Removing quotes may allow a broader search: (((( big open conference ) or ( big ((europe conference) OR (european conference)) ))) or ( big ofthe conference )).