Hi Mikhail,
thanks for your feedback.
To perform a wildcard search with all filters available as in the legacy search, please use the attribute search. This is described in the document. In addition we will provide a specific blog series for the attribute search soon (part 4 of the optimize series).
In case you miss some information in our tips and tricks series, or you want that we cover a specific topic, feel free leave a comment in our overview page. If you face any issues finding specific notes, I can offer you a call. Just contact me.
Kind regards, Arno