Grouping Recommended Search Queries in Card Clusters

In one embodiment, a method includes receiving, from a client system of a first user of a communication network, an input from the first user to access a card-stack interface, generating one or more card clusters from a plurality of cards, each card comprising a query referencing a query-domain associated with the communication network and zero or more query-filters for the query-domain, wherein each query-filter references one or more objects of the communication network, each card cluster comprising one or more cards from the plurality of cards, the cards being formed into card clusters based on a card-affinity between the cards, and sending, to the client system in response to the input from the first user, the card-stack interface for display to the first user, wherein the card-stack interface comprises one or more of the card clusters.