Wiwynn is trading on the "Gre Tai Security Market", not the Taiwan Stock Exchange. The symbol in Screener.co is TPO:6669. You should click on the Markets menu in the upper left hand corner of the screen, move Gre Tai Security Market to the right, and then click Save Selections. Then, companies from that exchange will come up in your screens. You can also enter TPO:6669 in the View Profile text box in the upper right of the screen and click View to get a full profile of Wiwynn.
