Ok, here goes.
Go to your
search_results/default.tpl template.
And right bellow this line:
Code:
<vte:box module="box_article_list" params = "{content_params}">
(should be around line 16)
add following:
Code:
<vte:params>
<vte:param name="search_sort_by" value="created" />
</vte:params>
Basically, you can add more parameters if you need to sort your search results.
For example:
Code:
<vte:params>
<vte:param name="search_sort_by" value="created" />
<vte:param name="search_order" value="ascending" />
</vte:params>