In order to proceed with the insertion of the Search Results module, when logged in as an administrator, you have to follow this procedure:
Click
Add New Module and select the Search Results module. The following dialog box will be displayed:

Click the arrow beside Search Results and select Settings. Or click the icon   at the bottom of each module:

Select the Search results settings and the following dialog box will be displayed:

The available fields are all optional and allow to manage the settings of the search results.
In the
Maximum Search Results Number, enter the maximum number of results.

In the Results per Page field, enter the maximum number of results to be displayed per page.

In the Maximum Title Length field, enter the maximum number of characters that the search title can display.

In the Maximum Description Length field, enter the maximum number of characters that can be displayed.

If the Show Description field is unchecked, the description of each search result cannot be displayed by the users.