1. A computer-executed method for augmenting a privacy policy, the method comprising: obtaining a set of training documents and at least one seed keyword associated with the privacy policy; extracting a number of candidate keywords from the training documents; formulating at least one query based on the candidate keywords; issuing the query to a corpus; in response to the query, receiving a set of result documents; determining whether a respective keyword extracted from the result documents matches at least one seed keyword; augmenting the privacy policy by associating the candidate keyword corresponding to the respective keyword with the privacy policy based on the determination; applying the augmented privacy policy to a subject document; and producing a result to indicate whether the subject document triggers the privacy policy.