How to parse a product catalog with a search query?

Question

Parsing

Good day guys!
There are sites for example:
www.efind.ru/icsearch/?search=max232
workell.ru/poisk-komponentov
msk-kom.ru/poisk-komponentov
And the like.
The question is that they do not have an "open" list of all goods, that is, everything is found only by search query. How can you "pull out" everything that is, without suffering from the selection of each specific name?
Thank you!

Answer 1

alphabet
well and internal base