Windows 10 Search Wildcards

I've been having trouble with search results. Files that I know for sure are in the searched folder are not being returned when using File Explorer search. And using wildcards no longer seems to work.

A quick Google search of the web has turned up reports of others having this issue - but then Google always turns up only completely factual, accurate, trustworthy information doesn't it?

I'd appreciate hearing from Windows Central folks if you have any suggestions for getting better Search results. Thanks.