The tagset for the Vietnamese language contains 17 main lexical tags and one tag for an unrecognized token:

 Np  Proper noun
 Nc  Classifier
 Nu  Unit noun
 N  Common noun
 V  Verb
 A  Adjective
 P  Pronoun
 R  Adverb
 L  Determiner
 M  Numeral
 E  Preposition
 C  Subordinating conjunction
 CC  Coordinating conjunction
 I  Interjection
 T  Auxiliary, modal words
 Y  Abbreviation
 Z  Bound morphemes
 X  Unknown

There are also tags for delimiters and punctuations.

(This list was copied from the official readme file at
https://github.com/hakz/vntagger-gate-plugin.vntagger/blob/master/README.txt)