dir limitation?

[kendo679]

I'm using dir to find files using wildcards and specific text in the file name. The text string is a date in yyyymmdd format.
The folder being searched contains thousands of files, and when I search for a recent date "20170809" it finds the file as expected.
The files in this folder go all the way back to January of this year, but when I search for "20170715" or "20170601"... nothing is found.
There are multiple files in there that contain both of those date strings.

 

[kendo679]

Nevermind guys,
the file I was dir searching had been stuffed into a sub folder
windows search found it, but dir wouldn't