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.

neither direct, THUS
discouraging conversation,
The Big Bang Theory Season 12, Episode 24

...throwing the game
and THUS securing my friendship...
The Big Bang Theory Season 6, Episode 6

Thus giving him
the upper hand.
Breaking Bad Season 4, Episode 8

...THUS intimidating one's opponent.
The Big Bang Theory Season 1, Episode 13

And THUS began the chain of mistakes
that has led us both here.
Game of Thrones Season 5, Episode 1