try using quotation marks:
"guarding - mcp0259"
Without quotation marks the search returns any name that contains guarding OR - OR mcp0259
That is beacuse in name field space character is considered as "or". What I mean is if you write guarding - mcp0259 to name, all files that contains "-" will be showed up. İf you want "and" instead of "or" you should begin with ". ("guarding - mcp0259). Or you can use "=" for exact search. (you should write extension)
Please have a look at this article about wildcards