Yes, it's a Microsoft Word 97 - 2003 Document (.doc). I converted one to a current version of .docx and the document does show up in the search results. So it looks like the FileLocator Lite does not like some versions of Microsoft Word 97 - 2003 Document (.doc)?
I also re-saved it as a Word 97-2003 (.doc) using my Office 2013, and it now shows up in the search results. Very odd.