[Mediawiki-l] Partial word/string searching: "plan" does not match "plans"

[Matt England]

On my MediaWiki 1.4.0 system, I notice that a search for "plan" does not 
match text or titles with the word "plans" (among other similar mismatches).

Can I change this behavior (such that "plan" will match "plans") in my 
1.4.0 system?  In not, do later MediaWiki versions address this and/or 
might future MediaWiki version support this feature?  Is there an 
advanced-search feature available in 1.4.0 or later/future versions?

-Matt