Signals Notebook: Why partial search of the characters inside the brackets not working ?

For example: experiment with title "XXX(YYYYYtelluro)ZZZZZ"
When this is searched with "YYYYY" or "tellur" or "telluro" in the search no hits are found. When searching with "YYYYYtelluro" the hit is found. This is inconsistent since "YYYYYtelluro" is also NOT a separate keyword, but it is part of a larger word including the brackets.

The "(" character is a tokenizing character and equivalent to " ". Hence a full case insensitive search of the characters inside the brackets will work, searches for text in the middle of a string is not expected to work.