As mentioned earlier, rather than creating a JIRA Issue for a Case, you may want to look for any existing Issues that may be relevant. The View Suggested Issues option will automatically perform a search in JIRA for word tokens in Case subject (simulating to pasting the subject in JIRA search) and return a list of matching issues.
You may select from this list any and all Issues that you want to link to the Case for tracking their resolution. Alternatively, rather than automatically applying Case subject, you can also specify keywords in the text box and click on the Find Issues button.
zAgileConnect further extends the search feature by allowing you to enter JQL (JIRA Query Language) in Advanced Search mode. With JQL, you can be more precise in your search criteria (ex: Status = “To Do” and Issue Type = “Bug” and Project = “NCSV2”).