How do I get my RegEx to work correctly within Newsbin's subscription search?
Newsbin's internet search doesn't use Regex. It's more like a google search.
"word word -notword"
You can apply a regex filter after the search though using a search profile or typing it in. In your case, I'd probably search for the poster, then apply the regex to the subject after the fact.
Spaces are a problem in the current regex. Newsbin interprets them as an "and" so you might need to do "Indo.*China" to remove any spaces. "Indo.China" would work too if you know only one character separates them.
The watch lists don't currently do it but supporting a combination of regex on subject and search on poster, is probably the next thing I'm going to implement. I use "poster search" watch lists to collect up everything a particular poster posts into a dedicated list, then load up that watch list and use regex on the subjects of the results.