Yes it can, but you need to wrap the search in a phrase quote "MULTICERT_EM.GI_18_0001_pt.ppt" like that.
I created a new document called MULTICERT_EM.GI_18_0001_pt.ppt and entered this (including the quotes) into the simple search box:
"MULTICERT_EM.GI_18_0001_pt.ppt"
the document was found ok. By default Alfresco tokenizes words on punctuation so the above filename is converted to:
MULTICERT EM GI 18 0001 pt ppt
for the purposes of searching, you should be able to simply search for:
MULTICERT
and that will bring back the document in the results - it worked for me!
Thanks,
Kevin