find string in field of object – Javascript

I have string:

city = 'Hải Phòng'

and an array that I get from an API which looks like this:

data = [{},{},{},{ MaTinhThanh: 'xx', TenTinhThanh: 'Hải Phòng' },{},{}]

I want to find an object in my data:

mycity = data.find( c=>c.TenTinhThanh.includes(city))

the above gives undefined, but I expect

{ MaTinhThanh: 'xx', TenTinhThanh: 'Hải Phòng' }

My API endpoint is:

https://donhang.vnpost.vn/api/api/TinhThanh/GetAll

I am using visual code, Axios, nodejs

I also tried the getting the length of both strings:

data[3].TenTinhThanh.length` ====>11
city.length` ====>9

What is the problem?