Denshi Jisho — Online Japanese dictionary

Found 4 sentences.

そのについて勉強不足です I'm not schooled in that subject.
勉強不足せい試験落ちました He failed the exam because he had not studied enough.
失敗直接原因勉強不足だった The immediate cause of his failure was lack of study.
悪い成績勉強不足結果かも知れない His poor grades may come from lack of study.