What does `想要` emphasize exactly? So far I know 想 means want to e.g I want to know or I want to have.
要 is more like must or need e.g. I need to go or I must go.
Is 想要 more like 想得到 / 想有, that you want to get something, you want to have it, even you don't need it? Like you want to have a car on your own but you will never leave your room. That's the meaning to want to get or want to have to me.
or
Is 想要 more like 需要, that you need it even you don't want it? Like you need a pen to be able to write, but you don't really want it. If you don't need to write you will never buy a pen, you prefer buying a car. That's the meaning of need to me.
想要 + n: want to get/own something
想要 + verb: want to do