Alter Acquia Search Results
You can use hook_apachesolr_query_alter($query) to alter your results variable, if you're using Apache solr views and this error

Notice: Undefined property: apachesolr_views_query::$group_operator in apachesolr_views_query-&gt;build() (line 80 of /var/www/html/root/sites/all/modules/apachesolr_views/apachesolr_views_query.inc‌​).

this means that you didn't use filters in your view.