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.

Bunch of nances.
Game of Thrones Season 6, Episode 8

They're talking
to a BUNCH of people.
The Big Bang Theory Season 11, Episode 10

Yeah, I can see how that would...
A BUNCH of people?
The Big Bang Theory Season 2, Episode 2

And for a BUNCH of euros
is easy to rent a filthy warehouse
Money Heist Season 1, Episode 12

Anything that gets
the DEA's panties
in this big a BUNCH,
Breaking Bad Season 2, Episode 8