In fact, our Search index works with wildcards. If you search for: ent*, en*, e*, ent?, en?? or e?t, it will work. The only odd behaviour is that only the page title is shown without the highlighted content that matches your search. This is a because the highlighter doesn't support such wildcards highlighting and it may take us some time to implement.
Please notice that if you put ? or * in front of the search term, it won't work (*ent, ?nt and etc.). This is by design and it is not supported.
the Telerik team