Select User by Joining Multiple Meta Value Results

Try this one with additional join on metadata

SELECT u.ID, u.display_name
FROM wp_users u 
LEFT JOIN wp_usermeta  um1 ON u.ID = um1.user_id
LEFT JOIN wp_usermeta  um2 ON u.ID = um2.user_id
WHERE um1.meta_value="value1" AND um1.meta_key = 'key1'
AND um2.meta_key = 'keyA' AND um2.meta_value="valueA"
GROUP BY u.ID

Also use group by