có liên quan có quan hệ với ai cái gì 
related to like: có quan hệ → →
to not have diplomatic relations with ☊ 
không có quan hệ ngoại giao với ☊ She is having an affair with her boss. ☊ affair ☊
The firm has excellent customer relations. ☊ customer ☊
to have sexual relations (= to have sex) ☊ relation ☊
Little of what he said has any relation to fact. ☊ relation ☊
He's called Brady too, but we're no relation (= not related). ☊ relation ☊
Is he any relation to you? ☊ relation ☊
The firm has close ties with an American corporation. ☊ tie ☊