Hi,
I believe that there is no term as 'the best sun protection' cuz, if not used right, all of them won`t protect you from sun demage. Furthermore, I wouldn`t advise you to depend on random Thailand sun cream - rather buy it in pharmacy or use Nivea, etc.
Moreover, be sure to use it as often as it requires, not only once a day or so. As you have probably read stories here about melanoma and other skin cancers, be sure to not get yourself in trouble.
Take care!