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.

They may claim to use HEURISTIC algorithms,
but it may well be hokum.
The Big Bang Theory Season 2, Episode 3

Who the fuck is gonna help me
rebuild his entire
HEURISTIC base?
Westworld Season 2, Episode 8