hello every body .
there is something made me confused
which is right ?
what do u want to talk about ?
or
what do u want to talking about ?
Hi smart
I haven’t welcomed you to the forum yet, so I’ll do that now. Welcome! 
As to your question, the correct sentence is “What do you want to talk about?”
After the word “want” you need either a noun or to+verb. You should not use the “ing-form” after the word to in most cases.
My extra tip for you: Because we try to write correct English here, you should also write the word you correctly. 
Amy
as [size=200]you[/size] say sir
thank [size=150]you[/size] so much Yankee for welcoming me .and iam very happy here with [size=150]you[/size]
and iam greatful to [size=150]you[/size] for your response.
[size=150]Thank you[/size], smart! You’re a very fast learner.
By the way, you also shouldn’t call me “sir” because I’m not a man. You can call me Amy or Yankee … or ma’am, if you prefer being formal. :lol:
Amy
oke ma’am i’d like to call you ma’am because my natural ma’am is far away from me .i mean she lives in another city and i visit her twice amounth.
i well be good son for you.
you have to take care me because iam your son.
regards ma’am.