YOU SAID:

There is too many things that we don't know about

INTO JAPANESE

我々 が知らないあまりにも多くの事があります。

BACK INTO ENGLISH

We don't know too many things.

INTO JAPANESE

あまりにも多くのことがわかっていません。

BACK INTO ENGLISH

Too many things is not understood.

INTO JAPANESE

あまりにも多くのことはわかっていません。

BACK INTO ENGLISH

Too much that is not known.

INTO JAPANESE

あまりにも多くのことは知られていません。

BACK INTO ENGLISH

Too much that is not known.