Try to make your search as simple as possible:
Episcia will find all items including that sequence of letters.
Search results for "Episcia":
"Episcia cupreata x mix" - Episcia hybrids mixed at least 10 varieties
"Episcia dianthiflora" - Alsobia dianthiflora
"Episcia lynchei" - Nautilocalyx lynchei
"Episcia rosea" - Tetranema roseum