The BtoTree searchbar is a very powerful tool which permits you to find a lot of Products, services, people and businesses all over the world !
STEP 1: On the search bar, select the type of item you are searching for (here, listings)
STEP 2: Type the type of listing you are searching for and search
STEP 3: Click on in the upper left corner.
STEP 4: Select the categories and sub-categories you need.
You are in ! You have the products which corresponds to the categories you choosed !