Seeking Bertos or Bertosh

My great grandmother was Anna Bertosh (could be Bertos). She had a sister Mary Bertosh Borgon, a sister Elizabeth Bertosh Polak and a brother Andrew Bertosh. Their parents were Andrew Bertosh and Elizabeth Estok Bertosh. It is confirmed that they came from the village area of Kosicke (Kosice) Olsany in Slovakia. I can’t seem to find any immigration records on any of these names. I know that Anna, Elizabeth and Andrew were in the United States and they all lived in Pennsylvania. I need any help I can get in finding any records of immigration or records from Pennsylvania. I’m having trouble finding any records in Pennsylvania (Luzerne area) and I know my grandmother was born there. My great grandmother married a man named Steven Fink and my grandmother was born under the name Fink. Any help would be greatly appreciated.