To find a specific reward in Salad, you can use the Search Bar, highlighted below, to find the item.
Type in your search term and the App should automatically populate rewards that match. Remember that if you search for items like "Fortnite" or "Amazon," there will be multiple rewards that match that descriptor. Salad will display all of the matches like so:
Make sure there are no typos in your search terms, as this may hamper your search results. If you need more help finding items in Salad, either use the "Filter" feature, or scroll through the reward categories to discover your given reward.