Laughing in Salaah

Q: I understand that if one laughs aloud in Salaah, his wudhu breaks, and if he laughs silently, only his Salaah breaks. However, I wish to know what constitutes a loud laugh and what constitutes laughing silently. Also, is a smile considered laughter?

Husband gone missing

Q: I need a dua to read. My husband is in another country and he was on a journey and he was on the phone text with me and half way his phone just
went off. It's been 8 days his phones are off and never reach his house in Afghanistan. Please give me something to read so I can find him or any news of his to come to me. I'm so worried Ya Allah help me and my kids and my husband.