18. The apparatus of claim 11 , wherein the at least one processor is further configured to generate one or more electronic instructions to transmit information identifying the at least one target document to a device of a user.
11. An apparatus, comprising: a storage device that stores a set of instructions; and at least one processor coupled to the storage device, the at least one processor being operative with the set of instructions in order to: form a first feature vector for a search query received from a user having a plurality of search terms and being associated with a particular date, the first feature vector comprising a first set of numerical values corresponding to the search terms and including user interest data; obtain a set of second feature vectors for a plurality of documents having publication dates that are temporally proximate to the particular date, the set of second feature vectors comprising second sets of numerical values associated with terms in corresponding ones of the documents; compute, based on the second sets of numerical values, a centroid feature vector representative of at least a portion the second feature vectors; generate an augmented feature vector based on a comparison of the first feature vector and the centroid feature vector; and identify at least one target document that corresponds to the search query based on the augmented feature vector.