I've found an offer on Google Flights which I am not able to book somehow. It's a retour-trip from Amsterdam, Netherlands to San Jose, Costa Rica and Google FLights doesn't has a link to book the tickt. (Direct link to the Google Flight result: http://goo.gl/flights/psHc)
I've already tried to call with Swiss to book the flight, but they tell me they cannot find it either. Also ITA Matrix doesn't show this exact trip. Is this a bug in Google Flights or do I just have to look harder in order to get this ticket? And if so; where do I start looking? I already tried several other booking sites.