There are several reasons why Magento 2 search doesn’t work as supposed. Let’s see how to solve the most common issues.
Solving any problem you always start with the same action of cache flushing. For this, go to System > Cache management > Flush Magento Cache. If this doesn’t help, move to other points from our list.
Another common solution of a not-working search in Magento 2 stores is just setting up the right configurations. For this, navigate to Stores > Configuration > Catalog > Catalog Search and set 1 in the Minimal Query Length line and 128 in the Maximum Query Length line.
Then enable search suggestions and set 2 in the Search Suggestions Count line. Don’t forget to save the changes and flush the cache.
Sometimes you may get issues with the search if your Magento doesn’t index properly. So reindexing can help you with the problem. To do this, open System > Index management, then select all points with the mass action and choose Update on save form the Actions dropdown.
To make search results more relevant, you need to enable search by synonym functionality. For this, go to Marketing > SEO & Search > Search Synonyms. Next, click on the New Synonym Group button to create a new group of synonyms. In the opened page, specify the scope and enter the synonyms separating them by commas. Then save the changes and check the result on the frontend.
If the search by synonym is already on and your Magento 2 search still doesn’t work properly, double-check the configurations of synonym groups.
For more information about search by synonym, check the official Magento documentation.
See also: Try our Elastic Search extension and provide your customers with the most relevant search results. Put the needed goods first, correct misspellings automatically, gather and analyze the most frequent search queries to restock in-demand products and get rid of the dead stock.