Wasn't looking for this today, but found numerous websites that offer help and other ideas for finding a lost dog
http://www.lostdogsearch.com/index.htm
lots of good info & links to other sites
This is one of the website links - you can register your lost dog here:
http://www.lostdogsdatabase.com/
others links offer the same services.
Thinking some of this should be added to the sticky for how to find a lost yorkie
Praying for Deliah's safe return
Perhaps knocking on doors is important - perhaps you would hear her bark