Currently Ghost doesn’t come with any out of the box search feature.
There is a great search api called tapir which takes an RSS feed and indexes it. I found a library called Tapirus by metacotta. Unfortunatley the site no longer seems to be up. I put the library they wrote up on Github and made a few enchancements.
You can find it at here.
RelatedXcode Warnings With Swift
Exchange Issues On OSX
Facebook Invalid Redirect URI
Refresh favicon in browser
Using Gmail With a Custom Domain
OSX Keyboard Icons
Handy Xcode Snippets
Push Segue Without Animation
Library Not Loaded Image Not Found Error