There're 3 ways to explain the product search —
A. On the left corner of product zone - product search. You can use the category menu & fill out the key word to search product.

B. On the left of page, you can see the category you choose. And there's an item no. list below. Double click the item no. you desired, then you'll get the details on the page.
C. On the top of page, please fill key word in the "Relative Product Search" field. And you will get the results in the category.