I have do some research from Google regarding this, most of the reason why it didn't show Review stars on Google search result is because your blog pages with no authority and no page rank will likely not show the review stars in search results for the simple reason that Google does not trust the page enough.

At least have a Google Page Authority of 25-30 for the Stars to show in Search Results.

You can able to check your page Authority here: https://moz.com/researchtools/ose/

Thanks...I do think I meet those requirements and I thought page authority was actually domain authority (an entire domain, not a single page). I do have some ratings showing up in google index so I'm not sure how Google is deciding this.

Thanks

You're welcome

Yes, this is something we was unable to control it.