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.

root and STEM. chanting all the while.
Game of Thrones Season 3, Episode 4

Agh! Cherry STEM. Cherry STEM.
The Big Bang Theory Season 6, Episode 3

...can STEM from a pathological fear
of women.
The Big Bang Theory Season 2, Episode 15

You should have ripped
them all out, root and STEM.
Game of Thrones Season 7, Episode 1

Had to Heimlich a cherry STEM
out of Sheldon.
The Big Bang Theory Season 6, Episode 3