Simplify the following text for a Grade 6 native English-speaking person.
Original: Yeshe Tsogyal was the main compiler of Padmasambhava 's teachings , and it was she who concealed most of the termas .
Simplified: Yeshey Tsogyal was the main person who wrote down and collected Padmasambhava 's teachings . She also terma most of the hidden teachings called termas .