Some of my favorite test queries for shopping sites (from back when I used to work on a comparison shopping engine: [apples to apples] -> frequently returns ra

Some of my favorite test queries for shopping sites (from back when I used to work on a comparison shopping engine: [apples to apples] -> frequently returns random "Apple" products, because when you dedupe, stem and remove stopwords from that query, you're left with "apple", and Apple products are big ticket items. [shirt dress] -> frequently returns dress shirts, because many sites essentially ignore word order or the notion of compound words. [fish swim vest] -> frequently returns fishing vests, partially because of overstemming (many POS stemmers will stem "fishing" -> "fish", but in a product search setting, it's usually the wrong thing to do).