Can set multiple keyword in the URL?

[zaibnisa5000]

I can put more keywords in the url? How does it affect SEO? positive or negative?
Please!

[wipaq]

Yeah you can but not with the keywords from different categories as it make the search engines to get confused about the targeting keywords for that specific page. You can use in the below format
http://www.example.com/category-keyword ... yword.html