Advance search provied more espacific search to custom field
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http://pankajanupam.in/wordpress-plugins/advance-search/ for any issue & help me to improve the plugin.
I will reply within 1 day.
You can install Subdomains directly from the WordPress admin panel.
Visit the Plugins > Add New and search for 'Advanced Search'.
Click to install.
Once installed, activate and it is functional.
Manual Installation Advanced Search plugin:
Download and unzip the file
Upload the full extracted folder to the /wp-content/plugins/ directory
Activate the plugin through the 'Plugins' menu in WordPress.
You're done! The Plugin ready to use according to the directions in the description.