SearchWP Fuzzy Matches Extension
Fuzzy matching aims to make SearchWP a bit more lenient with search queries. Use this SearchWP Fuzzy Matches Extension to include search terms that are close in spelling to terms within your index. There are some filters available for this Extension that let you fine-tune how loose the fuzziness is.
Beyond basic fuzzy matching, SearchWP will apply some primitive spell checking to submitted terms. This filter lets you specify what minimum percentage should be used to constitute a valid match. Must be 0 – 100. (default is 80)
This is an extension of SearchWP Plugin. As to use this extension, you need to first install SearchWP Plugin.