căn cứ hải quân 
navy, naval base [ căn ] : (1) apartment, flat; (2) [CL for houses, apartments, rooms]; (3) cause, origin, root
[ cứ ] : (1) to continue to, go on, keep on (doing something); (2) evidence, proof; (3) still
[ hải ] : sea
[ quân ] : troops, army
Most Common Compounds Set 1:
Most Common Compounds Set 2 :