WTF - your keyboard set-up doesn't change when you go to a different country, if you have a Thai keyboard, as I do on my laptop, if I'm in the UK it's still a Thai keyboard! Just enter the password as you did in Thailand, nothing has changed unless you've damaged your keyboard during travel.
If your keyboard is damaged and shift+3 no longer gives you a hash, use the magnifying glass and search for Character Map and open, select the hash sign and copy.