WordPress search doesn’t search everything, and doesn’t give you enough control over what is searched and how. Relevanssi gives you full access and full control, with plenty of filters and ways to make Relevanssi work the way you want your search to work.
I wanted to boost the regular search function for a website that
contains many documents. I wanted to achieve that searching could be
performed much more accurately and visitors are served faster. For this
I bought the Relevanssi premium plugin. I received fantastic and fast
help for the installation. I strongly recommend going a step further and
buy the premium version!