You can’t. Singular matches to plural, because the fuzzy searching makes “cat” match to any word that begins with “cat” – “cats”, but also “catastrophe”, “cattle” and “catharsis”.
However, Relevanssi doesn’t know that when you search for “cats”, you also mean “cat”. How could it know? It doesn’t have any understanding of language. You can’t just go removing letter “s” from the end of the search terms, either, because not all words that end with “s” are plurals.
There is a solution, though, and that involves buying Premium. Premium includes a simple stemmer, which you can enable. The stemmer will strip the most common suffixes from words, both in the database and in the search queries, causing “cat” and “cats” to be equivalent, even without fuzzy search enabled.
Thanks, I got premium now.
I can’t seem to find any detailed info on the stemmer.
can you please explain about the stemmer, how would i remove the plural (s)
The installing instructions are on the Relevanssi Premium settings page in the sidebar. It’s very simple, just add this line to your theme functions.php:
add_filter('relevanssi_stemmer', 'relevanssi_simple_english_stemmer');
Then just reindex the database.