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.

Let go of VANITY,
Game of Thrones Season 5, Episode 7

didn't inflict their VANITY
on those who came after them,
Game of Thrones Season 5, Episode 7

I suppose I should be grateful
that your VANITY
Game of Thrones Season 1, Episode 7

And, out of VANITY,
Money Heist Season 1, Episode 5

And... I guess the truth is
it was all about my VANITY.
The Big Bang Theory Season 12, Episode 21