Vietnam is still in containment phase, so tests per million capita is not what I would look at. Rather, about 2400 tests against about 40 confirmed cases is a factor of 60 tests per confirmed cases (this should cover F1, F2). Italy on the other hand is about 60000 tests against 12000 confirmed cases, a factor of only 5. Hong Kong's number is impressive, 120. South Korea's 30.
You make a reasonable argument. In 2003-6 I helped out Viet Cervical cancer project on screening models for Pap smears to detect cervical cancer. Vietnamese incidence was high. Vietnamese public health organization was well organized and effective. Some lessons learned were published in Systems Analysis of Real-World Obstacles to Successful Cervical Cancer Prevention in Developing Countries