Search in documents

Good day friends I have the case of 90000 documents in pdf format on which must be searched with keywords and as a result of the search referencing in which documents with their file name are the keywords.
Do you suggest me to make a chat bot or what would be the solution being that every year the company is increasing more and more documents and if neural training is used then it should retrain the neurons to learn the new documents.
Please support me

I think a python script could handle it, because you are looking to do a search mission. You can build some loops to find this specific documents.