Hi BrightStar,
I've made the blog plugin and it currently is very minimal. It only supports showing all blog posts in a list, and having pages for each blog post.
First thing on the todo list for the blog plugin is to make the way pages are handled nicer, for this there are a
few issues open on WonderCMS. I am going to work on these next week.
When this is done, your search feature could really be a great addition to the plugin.
If you could create a issue on github describing what you'd want, and maybe even screenshots of similar functionality that would be great.
You can create an issue here:
https://github.com/StephanStanisic/simple-blog/issues
Thank you for using and providing feedback!