The Hebrew expression Torat Eretz Yisrael (literally "Law of the Land of Israel") refers to all Jewish teachings regarding the Land of Israel ("Eretz Yisrael"), in particular those written from or conforming to a religious-Zionist point of view.
Such teachings are for example the works of Rabbi Avraham Yitzchak Kook, the first religious-Zionist Chief Rabbi of the modern-day State of Israel. Today, it lives on in the works and teachings of rabbis like David Bar-Hayim, amongst others.
References
Torat Eretz Yisrael Wikipedia(Text) CC BY-SA