Vanguard Total International Bond Index Fund Admiral Shares (VTABX) offers higher-quality bonds (mostly in developed rather than developing countries) with comparable returns and a lower fee (0.11% vs 0.50% and 0.40%). Keep in mind that since all of these are low-yield funds, the expense ratios really become a significant factor over time. Overall, you will be hard pressed to find a bond fund that is low risk and has a 4-5% yield. 3% is doable, though.
1-year 3-year 5-year
VTBAX: 5.15% 3.20% 4.12%
PCY: 4.46% 4.70% 5.13%
EMB: 3.58% 4.60% 4.53%