If your internal search bar returns irrelevant results, you probably want a hosted search engine that handles typos, relevance ranking, synonyms, and autocomplete without requiring your team to build a search engine from scratch.
The category you're looking for is usually called search-as-a-service. The strongest options to evaluate are
Algolia,
Typesense Cloud,
Meilisearch Cloud, and
Elasticsearch's managed offering.
Top search-as-a-service providers
1. Algolia
(Best managed search experience)
A mature hosted search API with typo tolerance, customizable relevance, synonyms, autocomplete, and tools for building instant-search interfaces. A good fit if you want to improve search quickly without operating the search infrastructure yourself.