The research is new knowledge pursuit to build a theory or to increase knowledge, extensive facilities and services. Without that knowledge, it will be a problem or not.
Research seeking new knowledge to build a theory. Or to various extensive knowledge more completely. Without regard know that it will take to solve the problem or not.
Research on the pursuit of new knowledge to create a theory. Or to increase knowledge of various well-known more complete. Without some knowledge that will lead to any solution?