Search function behaving badly

<?php get_search_form(); ?>

I successfully use this code in http://tcwa.nutwork.com.au/?s=lorem and the return is a list of the page/post TITLES containing “lorem”. This is what I want.

I put EXACTLY the same code in here http://ma.nutwork.com.au/?s=migration+angel and the return is THE ENTIRE page/post containing the words “migration angel”.

Why oh why is it acting differently? Can I put in any parameters that will make the code only return the page/post titles?

Please please help! Thanks!