How were relations between Western and Central Europe of the Middle Ages?

For the sake of my argument, I define Central Europe as basically Bohemia and Hungary was known for it wealthy mines with Bohemia in particular called the Kingdom of Iron and Gold due to its wealthy silver mines.

I read that French House of Anjou inherited both the Hungarian and Polish thrones in 14th century but how did this impact the Kingdom of France itself considering Capetian House of Anjou was a vassal of the French Crown?

Moreover how did Western kingdoms such as England, France in general and Iberian Kingdoms interact with Central Europe and vice versa?