CREATE TABLE table_64666 ("World record" TEXT, "Snatch" TEXT, "Mu Shuangshuang  (  CHN  ) " TEXT, "139kg" TEXT, "Doha  ,  Qatar" TEXT)

What's the snatch when the 139kg was 305kg and the Olympic Record was the world record?
SELECT "Snatch" FROM table_64666 WHERE "World record" = 'olympic record' AND "139kg" = '305kg'
SELECT "Snatch" FROM "table_64666" WHERE "139kg" = '305kg' AND "World record" = 'olympic record'