Quick Search syntax

[seanferns]

I am having trouble working with the quick search feature and don't quite understand the format required. For example,
create a new database.
create a Note and give it the title "Stress Types"
In the text of the note type: https://www.aaa.com
https://www.bbb.com

Now go to quick search and type the following:
stress http => nothing found
stress http* => note is found
stress* http* => note is found
*stress* http* => nothing is found
*stress* *http* => nothing is found

The first one doesn't work because "http" is not present and "https" is, so the wildcard is needed. But the other four should and only 2 and 3 do.
How should this be done ?

Further to that when executing the fourth search I sometimes get the error:
Error saving item: Error committing transaction: database is locked
and cpu usage goes to 100% and the error comes again. I need to kill UltraRecall from the task manager and relaunch. The error continues to repeat and files with mj extension are created in the folder containing the urd file which I delete for it to work again.