Looking for a search plugin/widget to search a specific part of my site

Hey everyone,

I’m having trouble finding the right search plugin and/or widget for my website and I’m wondering if anyone of you could point me to the right one.

What I want is the following:

– Be able to have multiple (at least 2) search boxes on my website.
– The first and main search box needs to search through the whole site.
– The second search box needs to search through a specific part of the site (the product documentation part, that exists of 100+ pages).
– The second search box needs to be visible only on a specific part of the site (the product documentation section).

I have found plugins that make it possible to search through a specific part of the site (for example by category), but these always seem to replace the main search function.

I have spent many hours searching the internet and the forums here to find a solution, but with no result so I will be quite happy if anyone is able to help.

If there are questions, or more information is needed, be sure to ask. Thanks!