About the only thing I know to do like that when using the internal market is to just set buy/sell orders for any price. They will stay open until they are filled and you can cancel them at any time. It will remove the HIVE/HBD from your wallet and let them sit on the market, but nobody has access to those funds but you still unless they purchase them.

I don't use LeoFinance a whole ton, but after looking I couldn't find a search either. One thing you can do is use google to search and only show results from LeoFinance.

This is how you do that...

Simply add site:leofinance.io (or site:crypto.com or whichever site you want to search) after your search term, and you’ll get all the instances of that term on that particular site. Results from the rest of the web will be filtered out.

For instance: