I know that it is possible to do but all solutions are very simple.

I need to:

1. make a new order 

2. attach new or existing customer 

3. add MULTIPLE goods to one order, NOT ONE.

There is no problem to add one good to order. How could I add multiple goods to one order?

There is lookup form but it's not convenient to manage and edit orders.

Are there any ideas or solutions? Zoho CRM is very complicated, Zoho Creator should solve our problem but I'm stuck now...