Hi dioinarms and welcome to our community
I think you are fundamentally misunderstanding the difference
between Indexing and Searching.
When you use Search, you are scanning the entire help file
looking for instances of the word(s) used as the search criteria.
Indexing, on the other hand, is where you specify Index terms
that are used for users to locate topics that are related to those
terms.
Notice the help system has two different tabs. One labeled
Index and the other labeled Search. It's because the two are
entirely different things.
Hopefully this helps... Rick