Google Maps 3.0 the latest version for iOS and Android allows you to save maps to view offline. It's available for Laos but not for Thailand.
See the full list of available countries here: https://support.google.com/gmm/answer/2650347?hl=en&topic=2649131&ctx=topic
See the full list of available countries here: https://support.google.com/gmm/answer/2650347?hl=en&topic=2649131&ctx=topic