Contextual node-tags as Search Terms - How?

Hi

My need is kind of simple, but the problem seems complex.

I have a content-type called "Topic". These nodes are tagged with different topic-related words. I have another content-type, "Articles", with Title and Body.

I want to attach a view (EVA-field) to Topic-nodes, listing Articles that is relevant to the Topic-tag-names.

I almost managed to do it with Contextual Filter Search Terms, but only for 1 Topic-node-tag at a time. If the Topic-node has more than 1 tag, it searches for "tagname1, tagname2, ..". I think it would work if it instead searched for "tagname1 OR tagname2, OR ..", but how can i do this?

Or: Now that i've installed Apache Solr, is it possible to make a contextual filter with: "Find nodes where (clickable check-list of fields) is like (clickable check-list of fields)?

How to filter nodes by searching node-content for relevancy to taxonomy-term-names?

I'm not even sure where to post this question. I would love any help/guidance!