Generate keyword for post content, more word for content. If the content too short, use this plugin to add more keywords for content. Use shortcode [daipho_keywords] in post content or widget. Support Unicode.

WP AutoKeyword automatically suggests and generate keywords for all of your published post and add them automatically into your blog meta tags.

WordPress RB keyword research plug in grabs auto-complete keywords from Google to help you build your keyword list and optimize your website.