co-operation	co oper	0.1374
Viet Nam	vi nam	0.1374
Russia and Viet	rus and vi	0.1374
Hanoi	han	0.1374
countries	countr	0.0497
DEFENSE	def	0.0497
declaration	decl	0.0497
called	cal	0.0497
area	ar	0.0081