This default search will search all the manuals I have currently uploaded, this is the most flexible search option but may give you irrelevant results unless you are searching for very specific text, like a model number. Also not all pdfs are searchable because of bad scans, so that may not return you a result even if the manual is present. I'm current populating the Manual sorted by Manufacturer Page(link above), that will let you narrow your search down by Manufacturer, and shortly by item type and then you can search, which should be much more accurate. Thanks.