Umbraco 15 - One search term to search many fields

Hi all,

For a client we want to enable some more filters for their search page.
We are using the Content Delivery API to search the CMS content

We’ve added two additional filters, by following this guide: Extension API for querying | Umbraco CMS

In the above mentioned document, they refer to OR filtering, by adding a comma separated string list to the filter querystring. For example: “Filter=name:research,innovation”

I was wondering if there’s a way to filter in the index on multiple fields with the same value as an OR filter. For instance if you have this as your filter value: “filter=name:research,description:research,title:research”.

In this example, I would like to get results where “research” is in at least one of the fields “name”, “description” or “title”.

As far as I know chaining multiple filter querystring values acts as an AND filter, for instance: “Filter=title:research&Filter=description:research”.

Is anybody familiar with this? How would I create logic like this? Is it even meant to be used this way?