"Thank you very much, bye!"

Translation: Köszönöm szépen, viszlát!

[arracachaco]

So why among the options of "very much" it shows nagyon szépen, but the sentence Köszönöm nagyon szépen, viszlát is wrong?

[Findil]

That's not natural word order. The correct phrase is "nagyon szépen köszönöm". (Interestingly, if you only use "szépen", you can't put it in front of "köszönöm").

[arracachaco]

Oh, I see, Master Yoda style... (then, total madness).
Very much thank you

[zr3bek]

The translation is incorrect. Should be 'Nagyon szépen köszönöm, szia', but is not accepting