Database

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","classname":"k61caclc1","code":"16022261","vnumail":"16022261@vnu.edu.vn","accademicTrainningList":[{"semester":"1","classification":"Good","_id":"5f603a126d633e75884e9de3","score":80,"schoolYear":"2016"},{"semester":"2","classification":"Weak","_id":"5f603b1f3bd07d5cb4d6fecc","score":50,"schoolYear":"2016"}],"scoreList":[],"receiveScholarship":[],"prizeList":[],"scienceContestPrizeList":[],"wentAbroad":[],"tookTheTest":[],"punishList":[],"__v":0},{"gender":"No Record","profileImage":"https://kittyinpink.co.uk/wp-content/uploads/2016/12/facebook-default-photo-male_1-1.jpg","_id":"5f603a126d633e75884e9e47","fullname":"Nguyễn Trung Kiên ","birthday":"18/09/1998 ","classname":"k61caclc1","code":"16020588","vnumail":"16020588@vnu.edu.vn","accademicTrainningList":[{"semester":"1","classification":"Intermediate","_id":"5f603a126d633e75884e9dec","score":75,"schoolYear":"2016"},{"semester":"2","classification":"Weak","_id":"5f603b1f3bd07d5cb4d6fed5","score":55,"schoolYear":"2016"}],"scoreList":[],"receiveScholarship":[],"prizeList":[],"scienceContestPrizeList":[],"wentAbroad":[],"tookTheTest":[],"punishList":[],"__v":0},{"gender":"No Record","profileImage":"https://kittyinpink.co.uk/wp-content/uploads/2016/12/facebook-default-photo-male_1-1.jpg","_id":"5f603a126d633e75884e9e52","fullname":"Nguyễn Văn Mạnh ","birthday":"07/07/1998 ","classname":"k61caclc1","code":"16020606","vnumail":"16020606@vnu.edu.vn","accademicTrainningList":[{"semester":"1","classification":"Good","_id":"5f603a126d633e75884e9df7","score":80,"schoolYear":"2016"},{"semester":"2","classification":"Weak","_id":"5f603b1f3bd07d5cb4d6fee0","score":59,"schoolYear":"2016"}],"scoreList":[],"receiveScholarship":[],"prizeList":[],"scienceContestPrizeList":[],"wentAbroad":[],"tookTheTest":[],"punishList":[],"__v":0},{"gender":"No Record","profileImage":"https://kittyinpink.co.uk/wp-content/uploads/2016/12/facebook-default-photo-male_1-1.jpg","_id":"5f603a126d633e75884e9e60","fullname":"Tạ Văn Quỳnh ","birthday":"06/12/1998 ","classname":"k61caclc1","code":"16020637","vnumail":"16020637@vnu.edu.vn","accademicTrainningList":[{"semester":"1","classification":"Good","_id":"5f603a126d633e75884e9e05","score":80,"schoolYear":"2016"},{"semester":"2","classification":"Weak","_id":"5f603b1f3bd07d5cb4d6feee","score":59,"schoolYear":"2016"}],"scoreList":[],"receiveScholarship":[],"prizeList":[],"scienceContestPrizeList":[],"wentAbroad":[],"tookTheTest":[],"punishList":[],"__v":0}]

Query

db.collection.find({classname:"k61caclc1",accademicTrainningList:{$elemMatch:{semester:"1",schoolYear:"2016",classification:"Weak"}}})

Result