[HPDD-discuss] This JIRA search did not return LU's I am looking for

Hi, I entered "transaction.c" at the Search window of JIRA site, it returned one match at LU-1780. However, the 'transaction.c' text are in the subject line of LU-5040, LU-5336, and LU-5392. Yet, they were not returned from my search. How do I enter correctly in order to get a complete list of hits? Thanks, Jay