Isaiah uses a question to mock the wise men. The word "your" refers to Pharaoh. Alternate translation: "You do not have any wise men." or "Your wise men are fools." (See: [[rc://en/ta/man/translate/figs-rquestion]])
Isaiah is implying that wise men should be able to understand God's plans, but Isaiah does not really believe they are wise. Alternate translation: "If they were really wise, they would be able to tell you what Yahweh of hosts plans concerning Egypt" (See: [[rc://en/ta/man/translate/figs-irony]])