All products on your image do have bags in them. Some of them are sandbags but that’s English for you 
Epic’s error (or Epic error ) here is them having tag system that clearly differentiate ‘bag’ (UID: “a9c57d11-656d-4b02-af61-7b14c7f199d3”) from ‘sandbag’ (UID: “5d1bab9f-a7ba-4a5f-b9a1-96d0b1b30a5e”) still do not properly use it in search, falling back to simple text matching. Thus the results.