Hi,
You might be able to find the Janos Hay/Maria Mathias marriage here (perhaps the Hay/Kovacz marriage as well):
https://familysearch.org/pal:/MM9.3.1/TH-1942-20648-13817-63...Online a portion of the microfilmed civil records are digitized and online. You can order the microfilms to your local family history center:
https://familysearch.org/search/catalog/834529?availability=...Are you sure that Margit Kovacz was from Fuzesgyarmat in Bekes and not the Fuzesgyarmat in Hont?