ResearchGate's search function is rather elementary, it is not possible to do a sophisticated search. See https://help.researchgate.net/hc/en-us/articles/14292986311825-Discovering-and-requesting-research for some instructions. However, there are many other platforms like Google Scholar and others where you can search for research papers. Usually, the best platforms and bibliographic databases are those that relate to a specific field of research. Unfortunately, I don't know of any in your field (Artificial Intelligence, Artificial Neural Network, Programming Languages). Perhaps others may help.