17. The system of claim 13 , wherein the processing device is further configured to: identify additional documents to add to the updated set; receive input for the additional documents; and modify the updated set of training documents to include at least one of the additional documents based on the received input associated with the additional documents.
13. A system comprising: a memory; and a processing device coupled to the memory, wherein the processing device is configured to: update a set of training documents based on a selected portion of a training document of the set to obtain an updated set of training documents; search content within other training documents in the updated set using a machine learning engine based on the selected portion and variations of the selected portion; and determine a probability measure of the content; and classify a second training document containing the content based on the probability measure.