This document discusses volatile organic compounds (VOCs) and their potential use for early cancer diagnosis. It provides an introduction to VOCs and explains that they can be detected in body fluids and may provide a non-invasive screening method. The document also lists several text mining tools and techniques that can be used to search literature on VOCs and cancers, including PubMed, PubTator, Chilibot, and various databases for metabolomic data retrieval and linking.