Columbia subject headings:
Harvard subject headings:
Linguistics--Vietnam--Congresses.
Vietnamese language--Classifiers--Congresses.
Vietnamese language--Congresses.
Vietnamese language--Grammar--Congresses.
Vietnamese language--Noun phrase--Congresses.
Vietnamese language--Usage--Congresses.
Vietnamese language--Verb--Congresses.
Princeton subject headings:
Linguistics--Vietnam--Congresses.
Vietnamese language--Congresses.