It’s only possible by deactivating all the plugins via the database. Log in to your phpmyadmin or some equivalent database client and run the following query: UPDATE wp_options SET option_value = "" WHERE option_name = "active_plugins";
Let me know how it goes!
Also I’m not sure if it is only the search responsible entirely for white screen. Never had such issue before.
After deactivating all plugins, try to enable only the search, and if there is no white screen, then perhaps there is a conflict between plugins.