Actually, I don't get what verb do you mean: "Обрести" or "Обрестись".
1) Обрести means "to start possess something you can't touch by hands":
Обрести опыт, обрести свободу, обрести знания, обрести счастье.
2) Обрестись is a rare synonym of "найтись", "отыскаться", "образоваться". It isn't used in the conversational speech.