First of all, the real decimal value for your location is:
33.143333333333
-117.165 (there's a minus)
What I got surrounding address in San Marcos
306, Firebird Ln, San Marcos CA 92069
307, Firebird Ln, San Marcos CA 92069
308, Firebird Ln, San Marcos CA 92069
309, Firebird Ln, San Marcos CA 92069
310, Firebird Ln, San Marcos CA 92069
311, Firebird Ln, San Marcos CA 92069
I've put 3 links to show you the map
http://www.montrealsoft.com/software/image_map1.gif http://www.montrealsoft.com/software/image_map2.gif http://www.montrealsoft.com/software/image_map3.gif
Hope this help