This work* specifically addresses the search issues in unstructured peer-to-peer (P2P) systems that involve the design of an efficient search algorithm, the proposed dynamic search, and the modeling of P2P systems reflecting real measured P2P networks. Through simulations, we will show dynamic search outperforms other existing ones in terms of performance aspects. Categories and Subject Descriptors H.3.3 [Information Storage and Retrieval]: Information Search and Retrieval ? Search Process. General Terms: Algorithms, Performance, Design