Can i combine two products that are patent to create a new product and patent that new product myself?

Yes, you can if your combination itself is a patentable invention.  An invention is patentable if it is useful, new and non-obvious.  Almost all inventions that work in any way are useful.  An invention is new if someone has not done or described that exact invention before you did.  An invention is non-obvious if it would not have been obvious to a person of ordinary skill in the pertinent technology to combine the elements that make the invention do what it does. Even if your invention is patented, though, you may not be able to practice it if you must practice technology belonging to another in order to do so.  Example: there is a patent for a device for sitting, having a substantially horizontal platform for sitting and a plurality of substantially vertical legs distending from the platform.  This invention encompasses almost any furniture on which you can sit.  Suppose now I apply for a patent for a device for sitting comprising a substantially horizontal platform for sitting, a substantially vertical surface extending upward therefrom and four legs distending substantially horizontal below.  Suppose the patent examiner found this improvement in furniture new and non-obvious over what had been done before and issued a patent to me for my invention of a chair.  I still cannot practice my chair invention without a license from the earlier invention, which is said to "dominate" my invention. I strongly recommend you hire a patent professional for consultation on this matter.