Category Wise Search Widget plugin.You have option search specific category content.
Features :
- Search post category wise.
- Set default category.
- Exclude categories in search category field.
Download : http://wordpress.org/plugins/category-wise-search/
Customization,Plugin development,Plugin feed back :
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Installation Category Wise Search WordPress Plugin
- Upload the category-wise-search folder to the /wp-content/plugins/ directory
- Activate the plugin through the 'Plugins' menu in WordPress
- Go Appearance => widgets section see Category Wise Search
