I have this same problem. I use the same "subject sub-subject (...) specific query" tactic I've been using since forever and Google search has been becoming less effective for me over the years. I switched to DDG a couple of years ago I think, and it's better for handling that sort of thing.

Is there a search engine out there that respects quotes, and, or, case-insensitive when asked for, etc? In some ways I miss the days of altavista and similar search engines which had "advanced" tabs you could use to craft your query as closely as needed to find that one web page you know has what you need to find that you stumbled upon years ago.

The only time I use what the author refers to as "low intent searches" is when I've just heard a term or phrase I don't understand and don't know enough about it to ask specifically for something.