Solution : https://service.sap.com/sap/support/notes/170459 (SAP Service marketplace login required)
Key words :
additional key words matchcode, incorrectly converted matchcodes, 'search helps' key, data element char30, single-line display, matchcodes/search helps, required search, mjssc = search, line break, transaction se11
Related Notes :
| 336279 | M/SD: Nothing found by search help for streets |