What’s the Vietnamese Word for Frustrated?

How do I say “frustrated” in Vietnamese? I’m looking for a word to use in everyday conversation, not a literary or archaic word used in poetry hundreds of years ago.
A letter to my sons

Will you ever hear tiếng Việt and feel like it welcomes you in a soft embrace, a home entering your heart through your ears?
Goodbye is Never the Last Word

Mothering, especially in multiple tongues, is a slow process requiring patience and flexibility; a realization that came to me only after years of raising children.
Technically, Not Tenderly

Just as the Atlantic and Pacific Ocean come together and become undistinguishable at some point, I am equally immersed in both Vietnamese and English.