'Do' and 'does' are equally forms in the present indefinite tense in the verb 'to try and do.' Which a single you are going to use will mostly depend on the sentence's subject matter. Their use is almost similar, aside from a single instance where you can use 'do' https://financefeeds.com/smart-moneys-watching-these-4-best-copyright-to-buy-this-week-before-the-trend-catches-on/