it only outputs the longtitle of the page ( but still searches everything )Simply adapt your ajaxResult or result template. For instance with the non-ajax mode:
<div class="[+as.resultClass+]"> <a class="[+as.resultLinkClass+]" href="[+as.resultLink+]" title="[+as.longtitle+]">[+as.longtitle+]</a> </div>