Many downtown shops continue to rip off foreign visitors by selling cheap knockoffs at very high prices.
The American Chamber of Commerce says Vietnam is wasting investment and tourism potentials.
The top five's combined stock holdings were estimated at $1.63 billion at the end of November.
Buyers never know that the fish come from lakes contaminated by extremely dangerous chemicals.
Both have been praised by various travel sites for their exceptional and surreal beauty.
Poor Wi-Fi signal, dirty toilets and limited food choices are among the problems found.