Polite expressions

Obrigado/Obrigada. Thank you. (male/female person)
De nada. You are welcome.
Por favor.  Please/Excuse me (by asking information)
Desculpe. Sorry. (by apologizing)
Dá licença. Excuse me. (by making way/coming in)
Não tem problema. No problem/It doesn't matter.
Não faz mal. No problem/It doesn't matter.