http://www.mkdict.net/
Search by English, Mandarin characters, or Taiwanese romanization.
To search by Taiwanese, select the romanization system you want to use. You
can include tone numbers or diacritics, or search without them. If you are
using tone numbers, make sure to include the numbers for unmarked tones,
such as first and fourth tone in POJ and TRS.
http://i.imgur.com/9z0PFTJ.jpg