from a legal standpoint though it is absolutely possible to sue the car park operators for damages suffered as a result of the theft of your beloved ride
the clause stated in most car park in malaysia saying park at your own risk is not always held enforceable in the courts however this is subject to some exemptions such as if you park your car regularly at the same parking lot then it would be understood by the courts that you have fully understood and accepted all the clauses printed on the car park ticket and also if the exemption clause is stated clearly in the car park maybe on a signboard or printed in bold on the ticket
and as i know there may be several more exemptions to the clause that is normally stated by the parking operators but im too lazy to take out my Malaysian law book hehe
but in general if your car gets stolen in any parking lot around the world regardless if they say they already printed on the ticket or put up signboard saying park at your own risk dont just give up hope of recovering any damages/compensation for the hardship you have suffered firstly go and get the advice of a competent lawyer(by disclosing ALL the details of your situation) and then based on his advice see whether you have enough ground to take legal action against the car park operator or not do not simply just give up then and there and allow these car park operators to just take out hard earned money without protecting our cars while they are in their care
just my 2 cents