First, read the English article below.

Some people may assume that men should still pay for everything. However, that's usually not a true statement anymore. If she never even offers to pay for anything, even if you refuse, she could be using you. That is, when you talk on the phone or get together, see if she only talks about herself. If she doesn't take the time to listen to what's going in with you, then she's probably not in it for the long haul. That is, maybe she will only do things she wants to do. Alternatively, maybe she'll call only when something is going on in town, such as a big concert or a new club opening, that she wants you to pay for. She may also be hesitant to hang out when you suggest something, but eager when she wants to go somewhere. If she's always trying to keep her options open, rather than committing to plans with you, she could be just wanting to play the field. However, she also could just be stringing you along. If she's only calling late, say after 10 or 11 PM, she may just want to have sex with you. You do have to take her schedule into consideration; she may be calling late because that's when she gets out of class or off work. Of course, if you're both open to that type of relationship, it's fine. However, if you want more than that, you may need to end it. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Quan sát xem cô ấy có yêu cầu trả tiền thay cho bạn. Đánh giá xem cô ấy có đang lắng nghe thật sự. Kiểm tra xem có phải cô ấy chỉ muốn lựa chọn địa điểm cô ấy muốn đến. Đánh giá xem cô ấy có phải là người sợ bị ràng buộc. Quan sát xem liệu có phải cô ấy chỉ gọi cho bạn khi cô ấy muốn quan hệ tình dục.