If your search produces no results or produces results that you think are incorrect, check the following search criteria.
Verify that the correct sensor filter (CB filter) is selected for the search. Selecting All for this filter will ensure that data from all possible sensors is searched. See Selecting a sensor (CB) for the search.
Check the date range filter for the search. Verify that the date range is for a period of time in which the log data you are looking for is available. See Selecting a date range for the search.