This book discusses the topic of advanced text mining and applied principles in detail. Due to the development of computer and web technologies, we are now able to easily compile and store huge amounts of text data. It is believed that data consists of valuable knowledge. Text mining techniques have been dynamically analyzed for the extraction of knowledge from data since late 1990s. Even though many vital methods have been formulated, the text mining research field continues to expand for the needs emerging from distinct application fields. This book provides an introduction of advanced text mining techniques ranging from relation extraction to under or less resourced language. It aims at providing the readers with novel information about the field and assists them in exploring new research fields.