Formal:
* བཀྲ་ཤིས་བདེ་ལེགས་ (Tashi Delek): This is the most common and versatile greeting, often used as a welcome. It literally translates to "auspicious good fortune," but it's used as a general greeting, similar to "hello" or "good day."
* ཕེབས་པར་དགའ་བསུ་ཞུ། (Phebs Par Ga Su Zhu): This is a more formal way to say "welcome," literally meaning "we welcome your arrival."
Informal:
* ཁྱེད་རང་ལ་ཕེབས་པར་དགའ་བསུ་ཞུ། (Khyed Rang La Phebs Par Ga Su Zhu): This is a more casual way to say "welcome," meaning "we welcome you."
Specific to occasions:
* བོད་ལ་ཕེབས་པར་དགའ་བསུ་ཞུ། (Bo La Phebs Par Ga Su Zhu): "Welcome to Tibet."
* ཁྱེད་རང་གི་ཕེབས་སར་དགའ་བསུ་ཞུ། (Khyed Rang Gi Phebs Sar Ga Su Zhu): "Welcome to your arrival" (used when someone arrives at a specific place).
It's best to use Tashi Delek as a general greeting, as it's appropriate for most situations. You can use the other phrases depending on the context and your relationship with the person you are greeting.