' Should' is an auxiliary verb that expresses an obligation or a suggestion while ' would' expresses a request or a desire. Example: You should pay your speeding fine. Would you like some coffee?

Вы имеете ли учебник по грамматике английского языка, там все подробно написано!?

I would answer this questions if I knew Russian. Since I do not know Russian, I should not answer this question.