Convert the digital PDF into a physical workbook. Use a red pen to add Khrem (Khmer diacritics) above Pinyin where you mispronounce tones. Verified PDFs often have margins for this purpose.

Detailed lists for HSK Level 2 are also available, providing clear Khmer definitions for intermediate learners. 3. Integrated Language Apps & Tools

One of the most highly recommended "verified" resources is the Speak Mandarin in Five Hundred Words - Cambodian version.