CREATE TABLE table_68276 ("Value" TEXT, "Khmer" TEXT, "Word form" TEXT, "UNGEGN" TEXT, "ALA-LC" TEXT, "Notes" TEXT)

what notes have the khmer ?
SELECT "Notes" FROM table_68276 WHERE "Khmer" = '២៨'
SELECT "Notes" FROM "table_68276" WHERE "Khmer" = '២៨'