Perhaps you should try some spelling variations:
"royal meteorological instruments" » "royal meteorological measurements", "road meteorological instruments", "global meteorological instruments", "radar meteorological instruments"
"local meteorological instruments" » "local meteorological measurements", "global meteorological instruments", "scale meteorological instruments", "typical meteorological instruments"
"real meteorological institute" » "real meteorological input", "ray meteorological institute", "road meteorological institute", "radar meteorological institute"

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: (((("royal meteorological instruments") OR ("local meteorological instruments"))) OR ("real meteorological institute")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"royal meteorological instruments\") OR (\"local meteorological instruments\"))) or (\"real meteorological institute\"))".
• Removing quotes may allow a broader search: (((( royal meteorological instruments ) OR ( local meteorological instruments ))) or ( real meteorological institute )).
• Adding a wildcard symbol may retrieve word variants: (((("royal meteorological instruments") OR ("local meteorological instruments"))) or ("real meteorological institute"))*.