'Anywhere' searches lack focus and make it easy for an agent to say 'There is nothing.' Picking a destination and comprehensively exploring possible routings across the partners' networks will bring more success. Some skills in partner carriers' search tools is helpful.
Try this Delta routing:
departure 5/28/14
DL 5750 SFO-SEA
DL 232 SEA-AMS
That shows on delta.com as a saver award in coach, as do a few other dates SFO-AMS. I see SFO-JFK-FCO with lengthy layovers on 5/29; SFO-JFK-MAD with a lengthy layover 6/5...
Welcome to FlyerTalk.