CREATE TABLE table_76836 ("Name" TEXT, "Took Office" TEXT, "Left Office" TEXT, "President" TEXT, "Party" TEXT)

What is Name, when President is Khamtai Siphandon, and when Left Office is 1999?
SELECT "Name" FROM table_76836 WHERE "President" = 'khamtai siphandon' AND "Left Office" = '1999'
SELECT "Name" FROM "table_76836" WHERE "Left Office" = '1999' AND "President" = 'khamtai siphandon'