ốc đảo 
oasis [ ốc ] : (1) snail, mollusk, shellfish, animal with a shell; (2) house; (3) screw
[ đảo ] : (1) isle, island; (2) to turn (over, around, etc.); (3) to pray for rain
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
ốc đảo oasis