Mohammad & Hans I did not want to derail you with a discussion of search in general, but the problem is that email users can't do tagging so attention is needed to what can be found via searching?
I am NOT sure if its viable. (I.e. I'm not sure if the GG search mechanism would honour it) but maybe using simple hashtags (#) in post titles might help ... For example ... Title: "My Post About A New Tabs Plugin -- #plugin #tabs It would need testing. Josiah -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/7507c48b-3dfd-4882-86e2-bc7d50239c29%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

