Perhaps you should try some spelling variations:
institutes series » institute series, institutes services, institutes heis
medical sciences » social sciences
institute erie » institute series, institute esrin, institute die
nato » nano

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: nato advanced study ((institutes series) OR (institute erie)), series c — mathematical AND ((physical sciences) OR (medical sciences)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "nato advanced study ((institutes series) or (institute erie)), series c — mathematical and ((physical sciences) OR (medical sciences))".
• Adding a wildcard symbol may retrieve word variants: nato advanced study ((institutes series) or (institute erie)), series c — mathematical and ((physical sciences) OR (medical sciences))*.