VietTH: Hotfix issue searching more than 1 word

app/models/concerns/solr.rb

@@ -27,7 +27,7 @@ module Solr extend ActiveSupport::Concern
       return unless query.is_a?(Hash)
       @solr_page = options[:page] || 1
 
-      query = query.inject('') { |str, item| str << "#{item.first}:#{item.last}" << ' ' }
+      query = query.inject('') { |str, item| str << "#{item.first}:(#{item.last})" << ' ' }
       results = rsolr.paginate(
         solr_page,
         solr_per_page,