What do Vietnamese parents look for in a daughter in law? 🤔

To love their son and be nice to them. I guess.

Be polite ( in VietNam way) cook well do household chores. Etc

well, there are 2 diffirent types of Vietnamese parents consisting of tradition and modern. The tradition one always wants the daughter-in-law know how to do the housework as well as cook, they do not wonder if you have your own job or not, in their mind the wife must takes care the husband and his family (if you stay with his family). However, the other one is much more better IMO, they just need the wife know how to take care the husband, they encourage both of these two share housework and cooking, having your own carrier is an advantage to gain their respect an good emotion.

Don't worry about that. Be yourself.

Parents are more and more open-minded. Somehow you just need to know how to take care of your family, have a career (high or low salary is ok), behave well to the parent-in-law. Its ok.
Of course, the relationship between mother-in-law and daughter-in-law is always an endless issue. There is a funny saying for the daughter-in-law in the way to behave to mother-in-law: "make her adore you, or make her scared"