can i resign again after withdrawing my resignation in tcs?

Yes

Thanks, Can I resign with in 15 days.?

Of course you can, no one can stop you, if you have found something better then it is good to move out . If you are not tagged to a project you will be released early, else you have to serve 90 day notice period

Withdrawal got approved . But I want to resign once again since I have good offer in my hand .