Hi,
The suggest value is totally equal to value help results.
We can only change results by force using a search help exit.
See the sample search help WDR_TEST_H_SPFLI_EXIT and exit TEST_SHLP_2_COLUMS.
My idea for "No matches found" message :
Make a search help exit.
If DISP step and there's no result,
then add a line of result with empty key and a text "No matches found".
Regards,
Derby Lim