Complex sentence: The Vietnam People's Navy received in March and August 2011 two Gepard 3.9 class frigates ordered in 2006, built in Russia at Tatarstan's Gorky Shipbuilding Plant.
Split into simpler sentences: The Vietnam People's Navy received in March and August 2011 two Gepard 3.9 class frigates originally ordered in 2006. They were built in Russia at Tatarstan's Gorky Shipbuilding Plant.