How many suppliers for the part "hot spring dodger dim light" are in Vietnam?
part "hot spring dodger dim light" refers to p_name = 'hot spring dodger dim light'; Vietnam refers to n_name = 'VIETNAM'
SELECT COUNT(T3.s_name) FROM part AS T1 INNER JOIN partsupp AS T2 ON T1.p_partkey = T2.ps_partkey INNER JOIN supplier AS T3 ON T2.ps_suppkey = T3.s_suppkey INNER JOIN nation AS T4 ON T3.s_nationkey = T4.n_nationkey WHERE T1.p_name = 'hot spring dodger dim light' AND T4.n_name = 'VIETNAM'