Hi Pramila,
As Brian stated, no 'Contains' operator is currently available for use with Atomic Conditions. An idea was raised regarding the addition of a 'Like' operator, which has gained attention and can help accomplish what you are looking to create. Please take a look at the following Idea, and give it an upvote!
"LIKE" option in atomic conditions
Thank you for your question. We look forward to your continued participation in Communities.
Regards,
Eddie