You can pass mutiple keys to get your result like below.
http://127.0.0.1:8092/test_db/_design/friends/_view/find_friends?keys=[“Sara Tiller”,“Jason Cribs”]&reduce=false .
To get more examples go to http://www.couchbase.com/docs/couchbase-manual-2.1.0/couchbase-views-writing-querying-selection.html