relation + manner in which people, groups or countries behave toward one another ☊ relationship + manner in which people, groups or countries behave toward one another ☊ relation ☊ 
hệ thức ☊ relation + manner in which people, groups or countries behave toward one another ☊ relationship + manner in which people, groups or countries behave toward one another ☊ relation ☊ hệ thức ☊