What is a normal amount of scopes in model

Ruby
1

I have Order model and there are more than 20 scopes. Now I want to add
complex search for it, it will have about 13 fields in form, so my model
will have additional 13 scopes. Is it good practice? Maybe I should
define new named scopes in concerns

2

There’s no precise information, what do you mean by scopes? You must be
familiar with object oriented programming paradigm, pick a book then
naturally you will order things better.