If she's deleted them you can't,try getting to her phone when she's not there only if you suspect she's in danger
How can I check my daughter's text messages after she has delected them?
You can't after she has deleted them but if yu think there still there get the phone when she isn't in the room or away for a bit so you can check but only do this if your 100% sure shes in danger or doing bad things but I she isn't she will hate you a lot for looking her texts.
