Cambodian: written ស្រី, from a Khmer word used in female personal names, meaning literally 'woman' and interpreted also as 'girl' FamilySearch Srey Name Meaning and Srey Family History at FamilySearch
This is a high-praise adjective meaning "outstanding," "distinguished," or "exceptionally skilled."
Because "Chlat" and "Chnerm" are aspirational qualities, the phrase is often used in school-related content or children's stories to encourage academic excellence and problem-solving skills.