Dynamic Content filters on RoboHelp

Hi,

I use Robohelp 2019.

I set 3 filter groups: Language (English, German), Technical (tech1, tech2) and Steps ( step1, step2).

Then, I assigned these tags to the topics. In such a way, each topic has one selection of each filter group. For example, Topic one is tagged with English, tech1, and step2. And Topic 2 is tagged with german, tech2 and step2.

My purpose is to enable the user to have only the topics which have exactly the selected filters. For example when he/she selects English, tech1 and step1 the topic 1 should appear; but when the user selects English, tech1, and step2, no topics should appear.

The problem I actually have is that the filters are seemingly applied with "Or" relations between them on the home page. For example, when I select german, tech2 and step2 I have all the topics with german tag and the topics with the tech2 tag and the topics with step2 tag. In other words, I have almost all the topics on the homepage. Then, when I access to a topic page, I have no content inside because the filters are applied now with "AND" relation. I do not use any condition expression. I would like to set "AND" relation between all the filters on the homepage.

Any help, much appreciated!