The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

Oh! A TISSUE! A TISSUE!
The Big Bang Theory Season 5, Episode 23

A doll won't work.
We have to open real TISSUE.
Money Heist Season 3, Episode 7

A mic hidden in the fat TISSUE,
in the skull, anywhere.
Money Heist Season 3, Episode 7

No TISSUE damage whatsoever.
The Big Bang Theory Season 3, Episode 3

Would you
like a TISSUE?
The Big Bang Theory Season 12, Episode 24