The document discusses research into whether short queries can be shortened further through identifying optimal subqueries. New features are proposed to evaluate subqueries, focusing on term relationships rather than statistical features used for long queries. These include term proximity, term score distribution, and compactness of term score tensors. Experiments on TREC collections found the new features improved subquery selection over baselines, with term proximity and score distribution features most important. Analysis indicates the new approach can effectively shorten short queries.