TCNG is implemented by PHP and SQLite 3. You can use, download and re-distribute the PHP scripts under GNU Affero GPL v3. The database file is distributed under CC BY-SA. By using the PHP scripts and DB file, you can build your own TCNG search site for your own work.
Download tcng.db - SQLite3 DB file. (737,321,984 bytes)
Download tcng.tar.gz - TCNG PHP scripts. (18,371 bytes)