如何在Magento中按类别搜索产品？

I am using Magento 1.9.1.0. Here I want search product by its category. Currently I have three categories.

Furniture 
Kitchen Accessories 
Electronics

Each category have their own products. Now in search field I type one of my category (for example Furniture). But it not gives proper result. It should show all product from that specified category (here Furniture). Unfortunately this gives some products from same category and some from other category.

In magento the attribute like Name, Description, SKU etc can make searchable. And these work good.

So my question is How can I search product by its category ??

Please Help me.....