Warning: Try to avoid (accidentally) using stemming; it seems to take forever for such a search to complete. I tried searching for NIGHTLY, forgetting that the stupid software would assume I meant NIGHTLY* -- and I had to cancel the search.
... Stemming (psy matches psychology) only works on single SEARCH terms that aren't preceded by AANY or AALL. So a search for psy alone would have lots of matches, but a search for AANY psy would show no matches (at this time). And a search for psy and, say, spy would look for the literal phrase "psy spy". /steve
BTW, cancelling a search failed for me at least once. It locked up the machine and I had to pull its plug. (I was not running, and had never run, a CE version on this particular HR2x.)