Searching key-words

Among other things, my job is to search the content of documents stored in pdf and find words that will allow me to find specific content. I am looking for a utility that will allow me to search for several or a dozen keywords using the ctrl + F keys. I am looking not for a sequence of words, but for each one individually. Is there such a feature in PDF ADOBE? So far, each time I had to enter each word in the CTRL + F window, then delete it and enter the next one again. The functionality that I am thinking of would make my work much easier and faster. Please let me know best regards, Joanna