Perhaps you should try some spelling variations:
study institutes » study institute, studiju institutas, studies institute
medical sciences » social sciences
study instutute » study institute, studies institute
series c » series co
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) OR (study instutute)) series, 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) or (study instutute)) series, series c — mathematical and ((physical sciences) OR (medical sciences))".
• Adding a wildcard symbol may retrieve word variants: nato advanced ((study institutes) or (study instutute)) series, series c — mathematical and ((physical sciences) OR (medical sciences))*.