stud_med the term is so unique that everyone is searching for these? The terms are used on multiple pages, and then on each page it has a different paragraph? As you see it is for me difficult to image your case, so therefore my ask for an actual example. Is using the term in the heading of paragraphs enough to find them and show in the snippets of fulltext matches?
There are three kind of search results presented : matches with the page id of an wiki page, matches in the fulltext of page with snippet of that text, and if there are many results then after certain number no snippets are shown for the remaining fultext matches.
For every so called full page result the SEARCH_RESULT_FULLPAGE event is triggered. There are eventually other events for other pieces of the search results.
I think there is not yet a plugin using them in a manner you proposed. You could write a plugin to change the layouting.