In Romanian, Ceanga would be pronounced as "chay-AHN-gah" and Stoiko of course as "STOY-ko" (emphasis on the CAPITAL letters).
Ceanga is likely the original Romanian spelling. In USA you should check out phone listings starting with "chay-" or "shay-" spelling. Don't try to spell out the entire word, just write chay* or whatever they tell you, and all the variations of the name will likely pop up. In the USA, the immigration officials would have often changed the spelling, because the name doesn't resemble any kind of Anglo-Saxon one.
With "Stoiko" I suggest you try the "stoyko" spelling in USA, but perhaps try looking for it as "stoijko" or "stojko" in Romanian. You should check out their very good White Pages at - http://www.paginialbe.rohttp://www.paginialbe.ro - just to see how many you can find.