Luna 23 launched to the moon 1974

Luna 23, launched October 28, 1974, was a Soviet spacecraft that  was intended to land on the moon and return to Earth with a sample of lunar soil.  Luna 16 and Luna 20 had returned successfully to Earth with samples taken from depths of 0.3 m.  Luna 23 was to drill down to 2.5 m, but upon landing, it tipped over onto its side, thus rendering any sampling impossible. 

Scientists manged to remain in contact with the probe until November 9.

Luna (Lunik) 20, second Soviet lunar sample return mission, launched 1972

Luna 20 (Soviet name: Lunik 20) launched February 14, 1972 and was the second successful Soviet mission to send a probe to the moon and have it return with lunar samples.  It touched down on the Moon's surface February 21 in Terra Apollonius.  After collecting about 55g of lunar material, the ascent stage blasted off February 22, and returned to Earth landing in Kazakhstan.

In 2010, the U.S.' Lunar Reconnassaince Orbiter spotted Luna 20's landing stage.