What are the best performing exchange-traded funds (ETFs) available to investors in Cambodia that offer strong long-term returns, diversified market exposure, and access to global investment opportunities across sectors such as technology, energy, emerging markets, healthcare, and fixed income? Which international ETFs accessible through Cambodian banks, brokerage platforms, and global investment providers have delivered the highest historical performance based on returns, liquidity, and asset growth? How do global equity ETFs, emerging market ETFs, dividend-focused ETFs, and sector-specific funds compare in terms of risk, expense ratios, diversification benefits, and long-term investment potential for investors in Cambodia? Which ETFs are considered the most attractive investment options in Cambodia based on historical performance, market stability, portfolio diversification, and investor demand?