Is there a 'bounds' parameter in Yahoo like Google?

Hi,
I geocode a adress with Yahoo and the same with Google, and the results are differents.... In Google there is a parameter name 'bounds' which is a rectangle where you can include, for example, the city, in lat and long, and the results are in lat and long inside this rectangle.

But in Yahoo i dont know this parameter, and the results can be outside this rectangle.

Do you know a similar parameter in Yahoo??

thanks and sorry for my english.. :)