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).
Ad yefk tallalt ɣef tladna tulmist (ma yella azrir n unadi yettunefk-d u tettwaf tenmeɣṛuṭ ines tufrint) neɣɣef tludna yellan (ma yella azrir n unadi ur d-ittunefk ara, neɣ ur tettwaf ara tenmeqṛuṭ ines tufrint).