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).
Bheir seo cobhair dhut le àithne shònraichte (ma rinn thu lorg 's ma chaidh deagh mhaids a lorg) no mu na h-àitheantan a tha ri làimh (mur an do rinn thu lorg no mura deach deagh mhaids a lorg).