Ravi, I have been unable to duplicate the issue where Chrome hangs when performing a search with a term enclosed within brackets.  I tested it both the default search and also the advanced search.

 

You may want to reindex the account and re-test.  If that does not solve the issue, you may need to open a support ticket.

 

Applies to SmarterMail 8.x - 13.x

1. Log in to SmarterMail as the domain administrator.
2. Select the desired Domain and choose the Manage option on top of the menu bar or right click on the Domain.
3. Click the Settings icon.
4. Expand the Domain Settings folder in the navigation pane and click Users. A list of users on the domain will load in the content pane.
5. Select the desired user and click Reindex in the content pane toolbar.