Looking for an onsite opportunity, but I don't have experience certificate. Suggestions?

I have more than 2.5 years of experience in onsite with client. I worked as a developer for 6 months based on my performance I have been moved to Malaysia for client side support and doing my support for more than 2 year now I left my job due to my family welfare and looking for a new job. If there is any openings please do let me know.

Welcome to CrazyEngineers, @Siddhartha . You didn't tell us if you're currently in Malaysia or any other location. 

Not getting experience certificate is a mistake. Your employer must provide you with experience letter and there's no reason they should say no to providing one. Without it, finding a new job is going to be difficult. 

Your first task should be to find a job that matches your skills-set. We don't know what technologies or tools you are well versed with therefore we cannot provide you with any suggestions or job recommendations. 

In any case, you must contact your employer and demand your experience letter.