Provide help either on a specific command (if a search string is provided and an exact match is found) or on the available commands (if a search string is not provided, or if no exact match is found).
O dâ 'na man in sce 'n comando specifico (s'a vegne inseria 'na stringa de riçerca e a vegne atrovâ 'na corispondensa ezatta) òpû in sci comandi disponibili (s'a no vegne fornia 'na stringa de riçerca ò no vegne atrovæ corispondense ezatte).