well, the chord is a simple one 
the song starts from -----

Tumse yun milenge
 F         F       
humne socha na tha
    Am     Bflat
aur yeh 
  C(E-3||B-5||G-5||D-5||A-3||E-3)
Zindagi
  F

Twice-----

mehakengi tumhari bahoon mein (twice)
  F         Am          Dm   

CHOROUS
 
tum tum the kahin 
   F      Am
the humare kuch nahi
   E          Dm
similarly hum.......nahi

itna chhota jahan 
 E        Am
ab achanak hua
  F       Dm
pehle kyun hue na tum mere
    F        Am     Dm

the song goes on..................

                                    ----------By Digvijay dharwa

please reply me --digvijay_15dh@rediffmail.com