Possible interpretations:
* "Hola muchacho": This is the correct spelling and means "Hello, boy" in Spanish.
* "Hola, muchacho": This is another correct spelling, meaning the same as above but with a comma separating the greeting and the term of address.
* Misspelling: "Ho la muchacho" could be a misspelling of one of the above options.
Please note: While "muchacho" can be used to address a young man, it might be considered somewhat informal or even disrespectful in some contexts. It's always best to use a more formal term like "señor" or "joven" when addressing someone you don't know well.