Perhaps you should try some spelling variations:
legal institutions » social institutions
local institutions » social institutions, fiscal institutions, informal institutions
royal institution » original institution

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 institution) OR (((((local institutions) OR (political institutions))) OR (legal institutions)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((royal institution) or (((((local institutions) OR (political institutions))) or (legal institutions))))".
• Adding a wildcard symbol may retrieve word variants: ((royal institution) or (((((local institutions) OR (political institutions))) or (legal institutions))))*.