I suggested a security door earlier, which seems to be the most secure option for a condo I would have thought. You only have to go to any big condo complex like View Talay and you will find at least 90% have steel security doors. One, they aren't that expensive, two, you'd have to be pretty determined to force your way in, and three, you can leave the inner timber door open and get much better air flow through the apartment.

http://www.scorpiondoors.com/installation.html Pattaya located shop

A lock is only as strong as the door and door frame. All need to be strong.