Help with financial capital inflow
I don't like the question because money movement is a current flow and it is also capital flow.

Anyway, the current outflow (to pay for the goods from Mexico) will be matched by a capital inflow. Mexico will use the increase in earnings to buy goods and services and investments in Vietnam. If we assume proportions are constant before and after the increase in earnings, then some amount of the increase will go into investments in Vietnam. Investments are capital.