What about the introduction of keyword search?

with this, certain topic could be easily looked for as related to a particular post

The tag section, from my perspective its really good but new users find it a little bit hard to use appropriate tag as related to the post they made.

They usually end up using popular tag which is not in any form related to their post.

Making it somewhat hard to source them appropriately

It could be differentiated with the use of new, trending and hot tab as related to reward