Abstract: The invention provides methods, systems and computer programs for optimizing database search functionality. In an embodiment, the invention comprises (i) receiving at least one sequence of words, (ii) identifying within the received sequence of words, one or more strings, based on string attributes, (iii) identifying a class corresponding to each identified string, (iv) generating a tokenized sequence of words by substituting the detected one or more strings with corresponding class descriptor tokens associated with an identified class for such string, (v) generating word embedding vector representations corresponding to an individual word within the generated tokenized sequence of words, (vi) generating a neural network corresponding to the tokenized sequence of words, and (vii) recording an association between the selected sequence of words and the generated neural network or the vector representation of the tokenized sequence of words.