Advanced search specifically for terms should also work with synonyms

Because synonyms works by adding synonyms to the general index, when using advanced search to specifically search for the category (which someone looking for content tagged with a synonym of a term is rather likely to do), it does not show content that it does find by normal search.

Have not looked into this feasibility but it would be good to have Drupal core advance search and/or Views Fast Search etc. understand that terms have synonyms.