Currently the group search in azure active directory is done on the base of “Starts with”
I'd like to have extended search capabilities, like "include" "end with" "exclude" and so on
Thank you for your feedback! Our feature team is happy to announce that we’ve released the Enhanced Groups experience preview which includes improvements for search, sorting, and filtering of groups. This preview adds capabilities like substring search on groups lists and new member search.
Steve Patterson commented
This is super important to us - I can't believe there isn't some kind of wildcard search capability.