That's not too bad! The first one ("chew") is perfect, while the second one would be better if you said it with a stronger R sound.

Sometimes when the pronunciation of two words is almost the same (because of your accent) DON'T push yourself into its limit, the listener will know what you're talking about within the context, that what I always say to my students, wish you the best!

Your pronunciation of 'chew' is fine, but I can't hear the 't' in 'true'. It's a difficult word to say clearly, even for English speakers. Try to get the 't' sound by relaxing the tongue, instead of pulling it back as you do for 'ch', and then you just make a short 't' before closing your lips for the 'r'. I don't think it's that different from the 't' in Chinese e.g. tian. You have the same combination of 't' and 'r' in words like 'train', 'try', 'trim, 'translate', and 'transport'.

The way you pronounced "true" might make your listeners unsure of what you said. True should not really have a "ch" sound. For a typical "tr" sound, remember that "tr" is voiced and "ch" is not (just air), and try to start the t sound with your tongue further back from the roof of your teeth. It's very similar to sounding the "ter" from words like "matter" or "better". Hope this helps! 😁 Btw, I offer pronunciation lessons 🙂

That's like pefect. I think you said it correctly where most people if not everyone would understand you.