DONG
| Date | Clue |
|---|---|
| 2025-06-21 | Vietnamese currency |
| 2015-01-20 | Bell sound |
| 2014-03-13 | Vietnamese currency |
| 2013-09-18 | End of a doorbell sound |
| 2011-04-13 | Doorbell sound |
| 2009-09-10 | Half a ring |
| 2008-12-02 | ... a doorbell |
| 2004-06-12 | Steeple sound |
| 2001-07-06 | Tintinnabulation |
| 2001-03-11 | Vietnamese currency |
| 2000-07-21 | Bell sound |
| 1999-10-11 | Doorbell sound |