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.

Why are you burying
all this TREASURE?
Vikings Season 1, Episode 3

likewise filled
with such TREASURE,
Vikings Season 1, Episode 3

It's like misreading
a TREASURE map
The Big Bang Theory Season 7, Episode 10

...that the finder of a sunken TREASURE
is the owner.
The Big Bang Theory Season 3, Episode 17

The entire nation dedicated a decade
of effort and TREASURE...
The Big Bang Theory Season 2, Episode 7