It is Dukatskoe , not Dukatskoye, Evgenii not Yevgeny or Yevgeni or Yevgenyi or Yevgeniy. I use Ya , not Ia, Yu not Iu. Boolean searching is allowed. Free text searching is allowed. Exact phrase searching is allowed.
Subject codes can be very useful in helping narrow a search.
An explanation of how they are derived is available. Right now you can't, really. But you can check out each month by using truncation. See below for an example. I generally like to use the nominal form in place names.