Custom Search

Hi,
I want to make one widget in the right for a website of used industrial automobiles, and I just want selection boxes, the category (Agricultural machinery or Industrial), sub categories, diesel or gasoline and the brand. I already tried a lot of plugins but I can’t put to work in any, and I guess is pretty simple. Is just the search widget and then just see the search results with the correspondent post with the specifications. There’s some plugin that someone recommend me? http://imgur.com/a/JDHvW
Thank you very much!