A system is provided, which may comprise: a word vector database configured to store word vectors, each of the word vectors representing a word or a phrase; a text database configured to store text data; and a processor configured to: receive a user input including a first term; obtain, for each word vector that is stored in the word vector database and that represents a word or a phrase other than the first term, a similarity between that word vector and a word vector representing the first term; select at least one second term based on the obtained similarity; perform a search in the text database using the at least one second term as a query for the search; and provide results of the search.