sentences:  In order to obtain liquor with a higher proof, many people resorted to distilling their own liquor in secret by hiding it in tall grass called "cỏ tranh" ("Imperata cylindrica"), or in another kind of grass called "đế" (Kans grass, which grows up to three meters tall), far away from their homes.Whenever such individuals saw the tax collector, they would bring their alcohol and hide it in a field overgrown with "đế" plants.