Tag section of document?

For a research project, I have a document that refers to multiple areas of research, each of which has its own tag. I could give that document all those tags - let’s say there are ten of them - in which case searching for one of those tags will turn up this entire document, but I’d have to search through it to find the section relevant to that tag.

Or, I could cut the document up into ten sections, one for each tagged subject, but that’s going to get labor-intensive as there’s quite a of documents needing this approach.

So I’m wondering: is there a way to assign a tag to a section of the document - say a paragraph two - so that a search for that tag would return only that section of the document, and not the other sections of the same document that do not have this one particular tag?

No you cannot tag internally in documents.