If the search keyword matches, can the search option show both listings and vendors in the same page?
For Example,
search:drawings
Result: Listings with keyword drawings on Top
Vendors with keyword drawings down below and vice versa
Sorry, there’s no such option because there’s no way to combine both content types and layouts within the same page, this would require a custom implementation.
I recommend using 2 different search bars for this, especially if there may be different categories and attributes (fields and search filters) for listings and vendors.