Problem with ApI's understanding of track keywords OR bounding box location



Hii all
I want to capture tweets having specific keywords AND should be from specific region , but it looks like API supports only “Keywords OR from bounding box” As written below in locations example at their website.

“Bounding boxes do not act as filters for other filter parameters. For example track=twitter&locations=-122.75,36.8,-121.75,37.8 would match any tweets containing the term Twitter (even non-geo tweets) OR coming from the San Francisco area.”

Any idea?