The box below is an iframe that would have the search functionality. It doesn't right now because if you have a search form here, it will also appear on all other MLS pages. If you click on anything within the iframe (red dotted line) the content within the box will change, but the actual web page won't.
Vancouver First Realty has the ability because MLS listings are integrated directly into the Wix website. If you click on anything it would normally navigate to the search results page. This is why I created Wix MLS®. Eventually I will have MLS® coverage across North America to help fix these problems not just in Vancouver. Currently Wix MLS® is the only way to get MLS data on a Wix website in the same fashion as Vancouver First Realty.