I have bought several used cars here in Thailand and the following is what i do.
As soon as i am interested in a car i ask if it has a service(dealer) book,if not i pass.
If there is a book and the car has been serviced at the dealership you can get all
service information from the dealer.
Another way is go to Toyota Sure,they only sell second hand but young Toyota cars
and will place a warranty on what they sell.You may pay a bit more but you get peace of mind.
Or you could ask your friends if they have a lead.