YOU SAID:

I didn't find buffalo buffalo around there

INTO JAPANESE

私はそこに水牛バッファローを見つけなかった

BACK INTO ENGLISH

I did not find Buffalo Buffalo there

INTO JAPANESE

私はそこにBuffalo Buffaloを見つけられなかった

BACK INTO ENGLISH

I could not find Buffalo Buffalo there

INTO JAPANESE

私はそこにバッファローバッファローを見つけることができませんでした

BACK INTO ENGLISH

I could not find Buffalo Buffalo there