YOU SAID:

can I do better than this?

INTO JAPANESE

これ以上うまくできるでしょうか？

BACK INTO ENGLISH

Can we do any better?

INTO JAPANESE

もっと改善できないでしょうか？

BACK INTO ENGLISH

Can it be improved further?

INTO JAPANESE

さらに改善できるでしょうか？

BACK INTO ENGLISH

Can it be improved further?