"Those men want beer."
Translation:Ti muži chtějí pivo.
You mean the ch sound? If your language doe not have it, it it is harder to pronounce than sounds you learned as a child. It is pronounced smilarly to h, by narrowing a channel and letting turbulent stream of air make noise, but higher, not inside the throat, but close to the throat opening. It is a velar fricative.
I hovered over the English and it gave three sets of Czech words for each English word. It seemed like it might be three different ways to say the same thing, maybe depending on cases, so I picked the bottom words Tamto muzu chce piva wondering what it would enlighten me about, and it said Wrong answer. It said the correct answer was the sentence made from all the top words. So is that a work in progress going on when you hover in this page?