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