Ok, we'll put the fuzzy year searching in the maybe pile. It would be easy enough to implement if we decide to do it. But it did cross my mind that it might confuse people if they search for one year and see a lot of results with a different year. The other option perhaps is to add a check box under the search fields to turn this feature on/off?
For your other points, @deryckchan, I have been a bit slow in responding as it turns out that this gets quite complex. For some records both the Pinyin and Wade-Giles have been added, such as this one (see the notes section). In these cases the search would work for both options. Now, for records where this isn't the case it would be feasible to build a Pinyin to Wade-Giles translator, but this could take a bit of work so we'll probably have to also leave this as a maybe and review it later! I'm not sure how many records this really applies to and therefore whether or not the additional work will yield many more results.
Same goes for the word-division issue, where it would be complex to divide/join words programatically and search for all possible options.