Tips about default search help at Collective Search Helps
1, F1 to get the search help used by this field
2, Go to SE11 using this search help SD_DEBI
Here double click the appended search help will get a list of customized Elementary search helps.
The default search help is stored at field DEFSHLP. You can modify freely at this screen for example change to customize search help get from step 2 as required for specific users.