To find the right offer you need to go to the Marketplace section in your Ad Media interface:
When you are in Marketplace section you see all offers. You can filter them using our filters. Offers can be filtered by: Provider, Advertiser, Ad Inventory, Country, Vertical, Category, Payout currency and Transaction type.
In case you want to keep the filter settings, you can easily save it by clicking "Save filters" icon.
When you already know the name of the offer, you can also use search field in the overview: