What selectNodes expect as parameter?

Im trying to get the list of a nodes with a taxonomy, but it aways return null, but i have nodes with this taxonomy.

The code that im using is the following:
teste = jQuery.get("http://quemeuchamo.com.br/api/busca/taxonomia/selectNodes",{tid:"11378",pager:'false'});
I executed this on firebug console and the response is null

Anyone can help me ?
tks =)