keyword search feed for more than one keyword

ivoba

hi there
two questions:
1. is it possible to sort the search feed by date, f.e. dateBy=uploaded?
my feed just sorts by popularity and the DateBy thing is ignored:
http://www.smugmug.com/hack/feed.mg?Type=search&Data=graffiti&format=rss200&DateBy=DateUploaded&Size=Tiny&ImageCount=9

2. how do i search for more than one keyword?
http://www.smugmug.com/hack/feed.mg?Type=keyword&Data=graffiti berlin&format=rss200&DateBy=DateUploaded&Size=Tiny&ImageCount=9

this feed just finds keywords that are exakt like this: "graffiti berlin"
but it does not perform like logical AND search.
Data=graffiti+berlin does also not work

any help appreciated